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#1 2018-03-29 16:10:41

GNUser
Member
Registered: 2017-03-16
Posts: 423  

occasional boot hang on ascii [SOLVED]

Approximately 1 out of every 5-10 boots hangs on my T400 with ASCII. It seems to be completely random.

When it happens, the usual boot messages scroll by without any errors and then the messages are cleared to a black screen as usual, but instead of my desktop appearing the screen stays black with cursor blinking in the upper left corner of the screen. The only way forward is to press and hold the power button until system is off then power up again (or do SysRq + r-e-i-s-u-b).

Has anyone else experienced this? If not, can you help me troubleshoot? I guess setting up saved boot logs would be a first step?

Last edited by GNUser (2018-03-31 16:49:56)

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#2 2018-03-29 16:54:51

rolfie
Member
Registered: 2017-11-25
Posts: 48  

Re: occasional boot hang on ascii [SOLVED]

First of all, would you reveal your desktop and WM?

Haven't seen this with lightdm and Mate.

Have a look into the logs e.g. syslog from the previous boot where the bootup is stopping.

Regards, Rolf

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#3 2018-03-29 17:32:39

GNUser
Member
Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

I use MATE with its default WM, which is marco. My display/login manager is lightdm.

I took a look through /var/log/syslog but did not find anything obvious yet.

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#4 2018-03-29 18:01:33

GNUser
Member
Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

I just had another hung boot. It was 1:42 pm when the boot process left me at the black screen. I waited at the black screen until 1:46 pm before forcing a reboot with SysRq keys. These are the last few relevant lines from /var/log/syslog. I can go further back if necessary:

Mar 29 13:42:03 localhost nm-dispatcher: req:2 'up' [wlan1]: start running ordered scripts...
Mar 29 13:42:03 localhost NetworkManager[2445]: <warn>  [1522345323.3555] dispatcher: (2) bruno-nm-dispatcher-hooks failed (failed): Script '/etc/NetworkManager/dispatcher.d/bruno-nm-dispatcher-hooks' exited with error status 1.
Mar 29 13:42:03 localhost ntpd[2170]: Soliciting pool server 66.135.44.92
Mar 29 13:42:03 localhost ntpdate[2601]: the NTP socket is in use, exiting
Mar 29 13:42:03 localhost nm-dispatcher: req:2 'up' [wlan1], "/etc/NetworkManager/dispatcher.d/bruno-nm-dispatcher-hooks": complete: failed with Script '/etc/NetworkManager/dispatcher.d/bruno-nm-dispatcher-hooks' exited with error status 1.
Mar 29 13:42:03 localhost NetworkManager[2445]: <warn>  [1522345323.6479] dispatcher: (3) bruno-nm-dispatcher-hooks failed (failed): Script '/etc/NetworkManager/dispatcher.d/bruno-nm-dispatcher-hooks' exited with error status 1.
Mar 29 13:42:04 localhost ntpd[2170]: Listen normally on 4 wlan1 192.168.10.190:123
Mar 29 13:42:04 localhost ntpd[2170]: bind(24) AF_INET6 fe80::5eac:4cff:fe0d:5e5c%3#123 flags 0x11 failed: Cannot assign requested address
Mar 29 13:42:04 localhost ntpd[2170]: unable to create socket on wlan1 (5) for fe80::5eac:4cff:fe0d:5e5c%3#123
Mar 29 13:42:04 localhost ntpd[2170]: failed to init interface for address fe80::5eac:4cff:fe0d:5e5c%3
Mar 29 13:42:04 localhost ntpd[2170]: Soliciting pool server 162.210.111.4
Mar 29 13:42:04 localhost avahi-daemon[2306]: Joining mDNS multicast group on interface wlan1.IPv6 with address fe80::5eac:4cff:fe0d:5e5c.
Mar 29 13:42:04 localhost avahi-daemon[2306]: New relevant interface wlan1.IPv6 for mDNS.
Mar 29 13:42:04 localhost avahi-daemon[2306]: Registering new address record for fe80::5eac:4cff:fe0d:5e5c on wlan1.*.
Mar 29 13:42:04 localhost ModemManager[2516]: <info>  Couldn't check support for device at '/sys/devices/pci0000:00/0000:00:19.0': not supported by any plugin
Mar 29 13:42:04 localhost ModemManager[2516]: <info>  Couldn't check support for device at '/sys/devices/pci0000:00/0000:00:1c.1/0000:02:00.0': not supported by any plugin
Mar 29 13:42:05 localhost ntpd[2170]: Soliciting pool server 66.96.99.10
Mar 29 13:42:05 localhost ntpd[2170]: Soliciting pool server 62.168.65.36
Mar 29 13:42:06 localhost ntpd[2170]: Soliciting pool server 89.40.116.249
Mar 29 13:42:06 localhost ntpd[2170]: Soliciting pool server 45.76.244.193
Mar 29 13:42:06 localhost ntpd[2170]: Listen normally on 6 wlan1 [fe80::5eac:4cff:fe0d:5e5c%3]:123
Mar 29 13:42:07 localhost NetworkManager[2445]: <info>  [1522345327.2660] manager: startup complete
Mar 29 13:42:07 localhost ntpd[2170]: Soliciting pool server 85.93.7.12
Mar 29 13:42:07 localhost ntpd[2170]: Soliciting pool server 129.250.35.251
Mar 29 13:42:08 localhost ntpd[2170]: Soliciting pool server 96.126.105.86
Mar 29 13:42:08 localhost ntpd[2170]: Soliciting pool server 2600:3c01::f03c:91ff:fec8:5c8
Mar 29 13:42:14 localhost ntpd[2170]: receive: Unexpected origin timestamp 0xde67a3f5.77f33bc6 does not match aorg 0000000000.00000000 from server@45.76.244.193 xmt 0xde67a3f6.40b18fc8
Mar 29 13:42:14 localhost ntpd[2170]: receive: Unexpected origin timestamp 0xde67a3f5.77feb327 does not match aorg 0000000000.00000000 from server@162.210.111.4 xmt 0xde67a3f6.45945a7c
Mar 29 13:42:38 localhost wpa_supplicant[2517]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Mar 29 13:43:21 localhost wpa_supplicant[2517]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Mar 29 13:44:24 localhost wpa_supplicant[2517]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Mar 29 13:46:24 localhost kernel: [  268.745006] SysRq : Keyboard mode set to system default

It seems that the last lines logged from the boot attempt were from ntpd, but maybe that's a red herring. Any ideas?

Last edited by GNUser (2018-03-29 18:36:14)

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#5 2018-03-29 18:23:28

bbatten
Member
Registered: 2017-07-02
Posts: 30  

Re: occasional boot hang on ascii [SOLVED]

GNUser:

How about closing your eyes and just typing in root<CR>, then your password<CR> and see what happens?

I recall at least one instance when I screwed something up that the VC was really alive and responsive - just nothing was being displayed.

.... or, maybe not.

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#6 2018-03-29 18:33:45

GNUser
Member
Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

bbatten, that's an interesting idea. I will try that next time I have the issue and will post the result in this thread. I do know that at least the kernel is running (SysRq key works and I can use it instead of power button to reboot).

Also, FWIW the problem affects all virtual consoles: When screen is black and I press Ctrl+Alt+F1 (or F2, F3, etc), instead of seeing a login prompt like I normally do I just see the same totally black screen.

Next time it happens I'll save the X and lightdm logs in addition to syslog.

Last edited by GNUser (2018-03-29 18:38:51)

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#7 2018-03-29 18:51:57

golinux
Administrator
Registered: 2016-11-25
Posts: 1,371  

Re: occasional boot hang on ascii [SOLVED]

Seems I remember someone else fixed something similar by changing to slim.  slim and lightdm have different backends.  Might be worth a try.  Might also be off the mark.

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#8 2018-03-29 18:58:35

GNUser
Member
Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

golinux might be on to something. I rebooted several times and it happened again after a handful of boots. This time I saved the entire /var/log directory.

Nothing interesting in the X log for the failed boot:

[     8.336] 
X.Org X Server 1.19.2
Release Date: 2017-03-02
[     8.336] X Protocol Version 11, Revision 0
[     8.336] Build Operating System: Linux 4.9.0-4-amd64 x86_64 Debian
[     8.336] Current Operating System: Linux thinkpad 3.16.0-5-amd64 #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08) x86_64
[     8.336] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.16.0-5-amd64 root=UUID=e0e5929c-fc57-4c5a-9efb-3922571850df ro quiet intremap=off loglevel=3
[     8.336] Build Date: 16 October 2017  08:19:45AM
[     8.336] xorg-server 2:1.19.2-1+deb9u2 (https://www.debian.org/support) 
[     8.336] Current version of pixman: 0.34.0
[     8.336] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[     8.336] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[     8.336] (==) Log file: "/var/log/Xorg.0.log", Time: Thu Mar 29 14:44:50 2018
[     8.337] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[     8.337] (==) No Layout section.  Using the first Screen section.
[     8.337] (==) No screen section available. Using defaults.
[     8.337] (**) |-->Screen "Default Screen Section" (0)
[     8.337] (**) |   |-->Monitor "<default monitor>"
[     8.337] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[     8.337] (==) Automatically adding devices
[     8.337] (==) Automatically enabling devices
[     8.337] (==) Automatically adding GPU devices
[     8.337] (==) Max clients allowed: 256, resource mask: 0x1fffff
[     8.337] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[     8.337] 	Entry deleted from font path.
[     8.337] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[     8.337] 	Entry deleted from font path.
[     8.337] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[     8.337] 	Entry deleted from font path.
[     8.337] (WW) The directory "/usr/share/fonts/X11/Type1" does not exist.
[     8.337] 	Entry deleted from font path.
[     8.337] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[     8.337] 	Entry deleted from font path.
[     8.337] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[     8.337] 	Entry deleted from font path.
[     8.337] (==) FontPath set to:
	/usr/share/fonts/X11/misc,
	built-ins
[     8.337] (==) ModulePath set to "/usr/lib/xorg/modules"
[     8.337] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[     8.337] (II) Loader magic: 0x55bd9c13de00
[     8.337] (II) Module ABI versions:
[     8.337] 	X.Org ANSI C Emulation: 0.4
[     8.337] 	X.Org Video Driver: 23.0
[     8.337] 	X.Org XInput driver : 24.1
[     8.337] 	X.Org Server Extension : 10.0
[     8.339] (++) using VT number 7

[     8.340] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[     8.340] (II) xfree86: Adding drm device (/dev/dri/card0)
[     8.342] (--) PCI:*(0:0:2:0) 8086:2a42:17aa:20e4 rev 7, Mem @ 0xe1400000/4194304, 0xd0000000/268435456, I/O @ 0x00005400/8
[     8.342] (--) PCI: (0:0:2:1) 8086:2a43:17aa:20e4 rev 7, Mem @ 0xe5900000/1048576
[     8.342] (II) LoadModule: "glx"
[     8.342] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[     8.344] (II) Module glx: vendor="X.Org Foundation"
[     8.344] 	compiled for 1.19.2, module version = 1.0.0
[     8.344] 	ABI class: X.Org Server Extension, version 10.0
[     8.344] (==) Matched modesetting as autoconfigured driver 0
[     8.344] (==) Matched fbdev as autoconfigured driver 1
[     8.344] (==) Matched vesa as autoconfigured driver 2
[     8.344] (==) Assigned the driver to the xf86ConfigLayout
[     8.344] (II) LoadModule: "modesetting"
[     8.344] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[     8.344] (II) Module modesetting: vendor="X.Org Foundation"
[     8.344] 	compiled for 1.19.2, module version = 1.19.2
[     8.344] 	Module class: X.Org Video Driver
[     8.344] 	ABI class: X.Org Video Driver, version 23.0
[     8.345] (II) LoadModule: "fbdev"
[     8.345] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[     8.345] (II) Module fbdev: vendor="X.Org Foundation"
[     8.345] 	compiled for 1.19.0, module version = 0.4.4
[     8.345] 	Module class: X.Org Video Driver
[     8.345] 	ABI class: X.Org Video Driver, version 23.0
[     8.345] (II) LoadModule: "vesa"
[     8.345] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[     8.345] (II) Module vesa: vendor="X.Org Foundation"
[     8.345] 	compiled for 1.19.0, module version = 2.3.4
[     8.345] 	Module class: X.Org Video Driver
[     8.345] 	ABI class: X.Org Video Driver, version 23.0
[     8.345] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[     8.345] (II) FBDEV: driver for framebuffer: fbdev
[     8.345] (II) VESA: driver for VESA chipsets: vesa
[     8.345] (II) modeset(0): using drv /dev/dri/card0
[     8.345] (WW) Falling back to old probe method for fbdev
[     8.345] (II) Loading sub module "fbdevhw"
[     8.345] (II) LoadModule: "fbdevhw"
[     8.345] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[     8.346] (II) Module fbdevhw: vendor="X.Org Foundation"
[     8.346] 	compiled for 1.19.2, module version = 0.0.2
[     8.346] 	ABI class: X.Org Video Driver, version 23.0
[     8.346] (WW) Falling back to old probe method for vesa
[     8.346] (II) modeset(0): Creating default Display subsection in Screen section
	"Default Screen Section" for depth/fbbpp 24/32
[     8.346] (==) modeset(0): Depth 24, (==) framebuffer bpp 32
[     8.346] (==) modeset(0): RGB weight 888
[     8.346] (==) modeset(0): Default visual is TrueColor
[     8.346] (II) Loading sub module "glamoregl"
[     8.346] (II) LoadModule: "glamoregl"
[     8.346] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[     8.351] (II) Module glamoregl: vendor="X.Org Foundation"
[     8.351] 	compiled for 1.19.2, module version = 1.0.0
[     8.351] 	ABI class: X.Org ANSI C Emulation, version 0.4
[     8.351] (II) glamor: OpenGL accelerated X.org driver based.
[     8.365] (II) glamor: EGL version 1.4 (DRI2):
[     8.369] (II) modeset(0): glamor initialized
[     8.369] (II) modeset(0): Output LVDS-1 has no monitor section
[     8.392] (II) modeset(0): Output VGA-1 has no monitor section
[     8.392] (II) modeset(0): Output DP-1 has no monitor section
[     8.512] (II) modeset(0): Output SVIDEO-1 has no monitor section
[     8.512] (II) modeset(0): EDID for output LVDS-1
[     8.513] (II) modeset(0): Manufacturer: LEN  Model: 4035  Serial#: 0
[     8.513] (II) modeset(0): Year: 2009  Week: 0
[     8.513] (II) modeset(0): EDID Version: 1.3
[     8.513] (II) modeset(0): Digital Display Input
[     8.513] (II) modeset(0): Max Image Size [cm]: horiz.: 30  vert.: 19
[     8.513] (II) modeset(0): Gamma: 2.20
[     8.513] (II) modeset(0): DPMS capabilities: StandBy Suspend Off
[     8.513] (II) modeset(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4 
[     8.513] (II) modeset(0): First detailed timing is preferred mode
[     8.513] (II) modeset(0): redX: 0.574 redY: 0.349   greenX: 0.335 greenY: 0.542
[     8.513] (II) modeset(0): blueX: 0.156 blueY: 0.136   whiteX: 0.313 whiteY: 0.329
[     8.513] (II) modeset(0): Manufacturer's mask: 0
[     8.513] (II) modeset(0): Supported detailed timing:
[     8.513] (II) modeset(0): clock: 69.5 MHz   Image Size:  304 x 190 mm
[     8.513] (II) modeset(0): h_active: 1280  h_sync: 1328  h_sync_end 1360 h_blank_end 1405 h_border: 0
[     8.513] (II) modeset(0): v_active: 800  v_sync: 803  v_sync_end 809 v_blanking: 822 v_border: 0
[     8.513] (II) modeset(0): Supported detailed timing:
[     8.513] (II) modeset(0): clock: 57.7 MHz   Image Size:  304 x 190 mm
[     8.513] (II) modeset(0): h_active: 1280  h_sync: 1328  h_sync_end 1360 h_blank_end 1405 h_border: 0
[     8.513] (II) modeset(0): v_active: 800  v_sync: 803  v_sync_end 809 v_blanking: 822 v_border: 0
[     8.513] (II) modeset(0): Unknown vendor-specific block f
[     8.513] (II) modeset(0):  LP141WX5-TLP2
[     8.513] (II) modeset(0): EDID (in hex):
[     8.513] (II) modeset(0): 	00ffffffffffff0030ae354000000000
[     8.513] (II) modeset(0): 	00130103801e1378ea1f359359558a28
[     8.513] (II) modeset(0): 	22505400000001010101010101010101
[     8.513] (II) modeset(0): 	010101010101261b007d502016303020
[     8.513] (II) modeset(0): 	360030be100000188b16007d50201630
[     8.513] (II) modeset(0): 	3020360030be100000180000000f0081
[     8.513] (II) modeset(0): 	0a32810a2814090030e4ed01000000fe
[     8.513] (II) modeset(0): 	004c503134315758352d544c503200eb
[     8.513] (II) modeset(0): Printing probed modes for output LVDS-1
[     8.513] (II) modeset(0): Modeline "1280x800"x60.2   69.50  1280 1328 1360 1405  800 803 809 822 -hsync -vsync (49.5 kHz eP)
[     8.513] (II) modeset(0): Modeline "1280x800"x50.0   57.71  1280 1328 1360 1405  800 803 809 822 -hsync -vsync (41.1 kHz e)
[     8.513] (II) modeset(0): Modeline "1024x768"x120.1  133.47  1024 1100 1212 1400  768 768 770 794 doublescan -hsync +vsync (95.3 kHz d)
[     8.513] (II) modeset(0): Modeline "1024x768"x60.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz d)
[     8.513] (II) modeset(0): Modeline "960x720"x120.0  117.00  960 1024 1128 1300  720 720 722 750 doublescan -hsync +vsync (90.0 kHz d)
[     8.513] (II) modeset(0): Modeline "928x696"x120.1  109.15  928 976 1088 1264  696 696 698 719 doublescan -hsync +vsync (86.4 kHz d)
[     8.513] (II) modeset(0): Modeline "896x672"x120.0  102.40  896 960 1060 1224  672 672 674 697 doublescan -hsync +vsync (83.7 kHz d)
[     8.513] (II) modeset(0): Modeline "960x600"x120.0   77.00  960 984 1000 1040  600 601 604 617 doublescan +hsync -vsync (74.0 kHz d)
[     8.513] (II) modeset(0): Modeline "960x540"x120.0   69.25  960 984 1000 1040  540 541 544 555 doublescan +hsync -vsync (66.6 kHz d)
[     8.513] (II) modeset(0): Modeline "800x600"x120.0   81.00  800 832 928 1080  600 600 602 625 doublescan +hsync +vsync (75.0 kHz d)
[     8.513] (II) modeset(0): Modeline "800x600"x60.3   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz d)
[     8.513] (II) modeset(0): Modeline "800x600"x56.2   36.00  800 824 896 1024  600 601 603 625 +hsync +vsync (35.2 kHz d)
[     8.513] (II) modeset(0): Modeline "840x525"x120.0   73.12  840 892 980 1120  525 526 529 544 doublescan -hsync +vsync (65.3 kHz d)
[     8.513] (II) modeset(0): Modeline "840x525"x119.8   59.50  840 864 880 920  525 526 529 540 doublescan +hsync -vsync (64.7 kHz d)
[     8.513] (II) modeset(0): Modeline "800x512"x120.3   51.56  800 800 828 832  512 512 514 515 doublescan +hsync +vsync (62.0 kHz d)
[     8.513] (II) modeset(0): Modeline "700x525"x120.0   61.00  700 744 820 940  525 526 532 541 doublescan +hsync +vsync (64.9 kHz d)
[     8.513] (II) modeset(0): Modeline "640x512"x120.0   54.00  640 664 720 844  512 512 514 533 doublescan +hsync +vsync (64.0 kHz d)
[     8.513] (II) modeset(0): Modeline "720x450"x119.8   53.25  720 760 836 952  450 451 454 467 doublescan -hsync +vsync (55.9 kHz d)
[     8.513] (II) modeset(0): Modeline "640x480"x120.0   54.00  640 688 744 900  480 480 482 500 doublescan +hsync +vsync (60.0 kHz d)
[     8.513] (II) modeset(0): Modeline "640x480"x59.9   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz d)
[     8.513] (II) modeset(0): Modeline "680x384"x119.6   42.38  680 716 784 888  384 385 390 399 doublescan -hsync +vsync (47.7 kHz d)
[     8.513] (II) modeset(0): Modeline "680x384"x119.9   36.00  680 704 720 760  384 385 390 395 doublescan +hsync -vsync (47.4 kHz d)
[     8.513] (II) modeset(0): Modeline "576x432"x120.1   40.81  576 608 668 760  432 432 434 447 doublescan -hsync +vsync (53.7 kHz d)
[     8.513] (II) modeset(0): Modeline "512x384"x120.0   32.50  512 524 592 672  384 385 388 403 doublescan -hsync -vsync (48.4 kHz d)
[     8.513] (II) modeset(0): Modeline "400x300"x120.6   20.00  400 420 484 528  300 300 302 314 doublescan +hsync +vsync (37.9 kHz d)
[     8.513] (II) modeset(0): Modeline "400x300"x112.7   18.00  400 412 448 512  300 300 301 312 doublescan +hsync +vsync (35.2 kHz d)
[     8.514] (II) modeset(0): Modeline "320x240"x120.1   12.59  320 328 376 400  240 245 246 262 doublescan -hsync -vsync (31.5 kHz d)
[     8.540] (II) modeset(0): EDID for output VGA-1
[     8.540] (II) modeset(0): EDID for output DP-1
[     8.660] (II) modeset(0): EDID for output SVIDEO-1
[     8.660] (II) modeset(0): Output LVDS-1 connected
[     8.660] (II) modeset(0): Output VGA-1 disconnected
[     8.660] (II) modeset(0): Output DP-1 disconnected
[     8.660] (II) modeset(0): Output SVIDEO-1 disconnected
[     8.660] (II) modeset(0): Using exact sizes for initial modes
[     8.660] (II) modeset(0): Output LVDS-1 using initial mode 1280x800 +0+0
[     8.660] (==) modeset(0): Using gamma correction (1.0, 1.0, 1.0)
[     8.660] (==) modeset(0): DPI set to (96, 96)
[     8.660] (II) Loading sub module "fb"
[     8.660] (II) LoadModule: "fb"
[     8.661] (II) Loading /usr/lib/xorg/modules/libfb.so
[     8.661] (II) Module fb: vendor="X.Org Foundation"
[     8.661] 	compiled for 1.19.2, module version = 1.0.0
[     8.661] 	ABI class: X.Org ANSI C Emulation, version 0.4
[     8.661] (II) UnloadModule: "fbdev"
[     8.661] (II) Unloading fbdev
[     8.661] (II) UnloadSubModule: "fbdevhw"
[     8.661] (II) Unloading fbdevhw
[     8.661] (II) UnloadModule: "vesa"
[     8.661] (II) Unloading vesa
[     8.661] (==) Depth 24 pixmap format is 32 bpp
[     8.801] (==) modeset(0): Backing store enabled
[     8.801] (==) modeset(0): Silken mouse enabled
[     8.801] (II) modeset(0): RandR 1.2 enabled, ignore the following RandR disabled message.
[     8.801] (==) modeset(0): DPMS enabled
[     8.801] (II) modeset(0): [DRI2] Setup complete
[     8.801] (II) modeset(0): [DRI2]   DRI driver: i965
[     8.801] (II) modeset(0): [DRI2]   VDPAU driver: i965
[     8.801] (--) RandR disabled
[     8.805] (II) SELinux: Disabled on system
[     8.812] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[     8.812] (II) AIGLX: enabled GLX_ARB_create_context
[     8.812] (II) AIGLX: enabled GLX_ARB_create_context_profile
[     8.812] (II) AIGLX: enabled GLX_EXT_create_context_es{,2}_profile
[     8.812] (II) AIGLX: enabled GLX_INTEL_swap_event
[     8.812] (II) AIGLX: enabled GLX_SGI_swap_control
[     8.812] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB
[     8.812] (II) AIGLX: enabled GLX_ARB_fbconfig_float
[     8.812] (II) AIGLX: enabled GLX_EXT_fbconfig_packed_float
[     8.812] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
[     8.812] (II) AIGLX: Loaded and initialized i965
[     8.812] (II) GLX: Initialized DRI2 GL provider for screen 0
[     8.815] (II) modeset(0): Damage tracking initialized
[     8.815] (II) modeset(0): Setting screen physical size to 338 x 211
[     8.849] (II) config/udev: Adding input device Power Button (/dev/input/event5)
[     8.849] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[     8.849] (II) LoadModule: "libinput"
[     8.849] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[     8.851] (II) Module libinput: vendor="X.Org Foundation"
[     8.851] 	compiled for 1.19.0, module version = 0.23.0
[     8.851] 	Module class: X.Org XInput Driver
[     8.851] 	ABI class: X.Org XInput driver, version 24.1
[     8.851] (II) Using input driver 'libinput' for 'Power Button'
[     8.851] (**) Power Button: always reports core events
[     8.851] (**) Option "Device" "/dev/input/event5"
[     8.851] (**) Option "_source" "server/udev"
[     8.852] (II) input device 'Power Button', /dev/input/event5 is tagged by udev as: Keyboard
[     8.852] (II) input device 'Power Button', /dev/input/event5 is a keyboard
[     8.867] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input7/event5"
[     8.867] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[     8.867] (**) Option "xkb_model" "pc105"
[     8.867] (**) Option "xkb_layout" "us"
[     8.867] (**) Option "xkb_options" "compose:menu,terminate:ctrl_alt_bksp"
[     8.895] (II) input device 'Power Button', /dev/input/event5 is tagged by udev as: Keyboard
[     8.895] (II) input device 'Power Button', /dev/input/event5 is a keyboard
[     8.895] (II) config/udev: Adding input device Video Bus (/dev/input/event2)
[     8.895] (**) Video Bus: Applying InputClass "libinput keyboard catchall"
[     8.895] (II) Using input driver 'libinput' for 'Video Bus'
[     8.895] (**) Video Bus: always reports core events
[     8.895] (**) Option "Device" "/dev/input/event2"
[     8.895] (**) Option "_source" "server/udev"
[     8.895] (II) input device 'Video Bus', /dev/input/event2 is tagged by udev as: Keyboard
[     8.895] (II) input device 'Video Bus', /dev/input/event2 is a keyboard
[     8.908] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input4/event2"
[     8.908] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[     8.908] (**) Option "xkb_model" "pc105"
[     8.908] (**) Option "xkb_layout" "us"
[     8.908] (**) Option "xkb_options" "compose:menu,terminate:ctrl_alt_bksp"
[     8.908] (II) input device 'Video Bus', /dev/input/event2 is tagged by udev as: Keyboard
[     8.908] (II) input device 'Video Bus', /dev/input/event2 is a keyboard
[     8.908] (II) config/udev: Adding input device Lid Switch (/dev/input/event4)
[     8.908] (II) No input driver specified, ignoring this device.
[     8.908] (II) This device may have been added with another device file.
[     8.909] (II) config/udev: Adding input device Sleep Button (/dev/input/event3)
[     8.909] (**) Sleep Button: Applying InputClass "libinput keyboard catchall"
[     8.909] (II) Using input driver 'libinput' for 'Sleep Button'
[     8.909] (**) Sleep Button: always reports core events
[     8.909] (**) Option "Device" "/dev/input/event3"
[     8.909] (**) Option "_source" "server/udev"
[     8.909] (II) input device 'Sleep Button', /dev/input/event3 is tagged by udev as: Keyboard
[     8.909] (II) input device 'Sleep Button', /dev/input/event3 is a keyboard
[     8.937] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:2a/PNP0C09:00/PNP0C0E:00/input/input5/event3"
[     8.937] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 8)
[     8.937] (**) Option "xkb_model" "pc105"
[     8.937] (**) Option "xkb_layout" "us"
[     8.937] (**) Option "xkb_options" "compose:menu,terminate:ctrl_alt_bksp"
[     8.937] (II) input device 'Sleep Button', /dev/input/event3 is tagged by udev as: Keyboard
[     8.937] (II) input device 'Sleep Button', /dev/input/event3 is a keyboard
[     8.938] (II) config/udev: Adding input device HDA Digital PCBeep (/dev/input/event7)
[     8.938] (II) No input driver specified, ignoring this device.
[     8.938] (II) This device may have been added with another device file.
[     8.938] (II) config/udev: Adding input device HDA Intel Mic (/dev/input/event8)
[     8.938] (II) No input driver specified, ignoring this device.
[     8.938] (II) This device may have been added with another device file.
[     8.938] (II) config/udev: Adding input device HDA Intel Dock Mic (/dev/input/event9)
[     8.938] (II) No input driver specified, ignoring this device.
[     8.938] (II) This device may have been added with another device file.
[     8.938] (II) config/udev: Adding input device HDA Intel Dock Headphone (/dev/input/event10)
[     8.938] (II) No input driver specified, ignoring this device.
[     8.938] (II) This device may have been added with another device file.
[     8.939] (II) config/udev: Adding input device HDA Intel Headphone (/dev/input/event11)
[     8.939] (II) No input driver specified, ignoring this device.
[     8.939] (II) This device may have been added with another device file.
[     8.939] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event0)
[     8.939] (**) AT Translated Set 2 keyboard: Applying InputClass "libinput keyboard catchall"
[     8.939] (II) Using input driver 'libinput' for 'AT Translated Set 2 keyboard'
[     8.939] (**) AT Translated Set 2 keyboard: always reports core events
[     8.939] (**) Option "Device" "/dev/input/event0"
[     8.939] (**) Option "_source" "server/udev"
[     8.939] (II) input device 'AT Translated Set 2 keyboard', /dev/input/event0 is tagged by udev as: Keyboard
[     8.939] (II) input device 'AT Translated Set 2 keyboard', /dev/input/event0 is a keyboard
[     8.956] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input0/event0"
[     8.956] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 9)
[     8.956] (**) Option "xkb_model" "pc105"
[     8.956] (**) Option "xkb_layout" "us"
[     8.956] (**) Option "xkb_options" "compose:menu,terminate:ctrl_alt_bksp"
[     8.958] (II) input device 'AT Translated Set 2 keyboard', /dev/input/event0 is tagged by udev as: Keyboard
[     8.958] (II) input device 'AT Translated Set 2 keyboard', /dev/input/event0 is a keyboard
[     8.959] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event1)
[     8.959] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "libinput touchpad catchall"
[     8.959] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[     8.959] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons"
[     8.959] (II) LoadModule: "synaptics"
[     8.959] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[     8.960] (II) Module synaptics: vendor="X.Org Foundation"
[     8.960] 	compiled for 1.19.0, module version = 1.9.0
[     8.960] 	Module class: X.Org XInput Driver
[     8.960] 	ABI class: X.Org XInput driver, version 24.1
[     8.960] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[     8.960] (**) SynPS/2 Synaptics TouchPad: always reports core events
[     8.960] (**) Option "Device" "/dev/input/event1"
[     8.992] (--) synaptics: SynPS/2 Synaptics TouchPad: x-axis range 1472 - 5598 (res 67)
[     8.992] (--) synaptics: SynPS/2 Synaptics TouchPad: y-axis range 1408 - 4670 (res 111)
[     8.992] (--) synaptics: SynPS/2 Synaptics TouchPad: pressure range 0 - 255
[     8.992] (--) synaptics: SynPS/2 Synaptics TouchPad: finger width range 0 - 15
[     8.992] (--) synaptics: SynPS/2 Synaptics TouchPad: buttons: left right
[     8.992] (--) synaptics: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
[     8.993] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[     8.993] (**) SynPS/2 Synaptics TouchPad: always reports core events
[     9.052] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input2/event1"
[     9.052] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 10)
[     9.052] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MinSpeed is now constant deceleration 2.5
[     9.052] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MaxSpeed is now 1.75
[     9.052] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) AccelFactor is now 0.038
[     9.053] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
[     9.053] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 1
[     9.053] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[     9.053] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[     9.054] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[     9.054] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)
[     9.055] (**) SynPS/2 Synaptics TouchPad: Ignoring device from InputClass "touchpad ignore duplicates"
[     9.055] (II) config/udev: Adding input device TPPS/2 IBM TrackPoint (/dev/input/event13)
[     9.055] (**) TPPS/2 IBM TrackPoint: Applying InputClass "libinput pointer catchall"
[     9.055] (II) Using input driver 'libinput' for 'TPPS/2 IBM TrackPoint'
[     9.055] (**) TPPS/2 IBM TrackPoint: always reports core events
[     9.055] (**) Option "Device" "/dev/input/event13"
[     9.056] (**) Option "_source" "server/udev"
[     9.056] (II) input device 'TPPS/2 IBM TrackPoint', /dev/input/event13 is tagged by udev as: Mouse
[     9.056] (II) input device 'TPPS/2 IBM TrackPoint', /dev/input/event13 is a pointer caps
[     9.076] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/serio2/input/input3/event13"
[     9.076] (II) XINPUT: Adding extended input device "TPPS/2 IBM TrackPoint" (type: MOUSE, id 11)
[     9.077] (**) Option "AccelerationScheme" "none"
[     9.077] (**) TPPS/2 IBM TrackPoint: (accel) selected scheme none/0
[     9.077] (**) TPPS/2 IBM TrackPoint: (accel) acceleration factor: 2.000
[     9.077] (**) TPPS/2 IBM TrackPoint: (accel) acceleration threshold: 4
[     9.078] (II) input device 'TPPS/2 IBM TrackPoint', /dev/input/event13 is tagged by udev as: Mouse
[     9.078] (II) input device 'TPPS/2 IBM TrackPoint', /dev/input/event13 is a pointer caps
[     9.079] (II) config/udev: Adding input device TPPS/2 IBM TrackPoint (/dev/input/mouse1)
[     9.079] (II) No input driver specified, ignoring this device.
[     9.079] (II) This device may have been added with another device file.
[     9.080] (II) config/udev: Adding input device PC Speaker (/dev/input/event12)
[     9.080] (II) No input driver specified, ignoring this device.
[     9.080] (II) This device may have been added with another device file.
[     9.081] (II) config/udev: Adding input device ThinkPad Extra Buttons (/dev/input/event6)
[     9.082] (**) ThinkPad Extra Buttons: Applying InputClass "libinput keyboard catchall"
[     9.082] (II) Using input driver 'libinput' for 'ThinkPad Extra Buttons'
[     9.082] (**) ThinkPad Extra Buttons: always reports core events
[     9.082] (**) Option "Device" "/dev/input/event6"
[     9.082] (**) Option "_source" "server/udev"
[     9.082] (II) input device 'ThinkPad Extra Buttons', /dev/input/event6 is tagged by udev as: Keyboard
[     9.083] (II) input device 'ThinkPad Extra Buttons', /dev/input/event6 is a keyboard
[     9.108] (**) Option "config_info" "udev:/sys/devices/platform/thinkpad_acpi/input/input8/event6"
[     9.108] (II) XINPUT: Adding extended input device "ThinkPad Extra Buttons" (type: KEYBOARD, id 12)
[     9.108] (**) Option "xkb_model" "pc105"
[     9.108] (**) Option "xkb_layout" "us"
[     9.108] (**) Option "xkb_options" "compose:menu,terminate:ctrl_alt_bksp"
[     9.110] (II) input device 'ThinkPad Extra Buttons', /dev/input/event6 is tagged by udev as: Keyboard
[     9.110] (II) input device 'ThinkPad Extra Buttons', /dev/input/event6 is a keyboard

However, lightdm log for the failed boot ends with an error:

[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.18.3, UID=0 PID=2329
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/01_debian.conf
[+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG:   [SeatDefaults] is now called [Seat:*], please update this configuration
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: Registered seat module xlocal
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Registered seat module unity
[+0.02s] DEBUG: Monitoring logind for seats
[+0.02s] DEBUG: New seat added from logind: seat0
[+0.02s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.02s] DEBUG: Seat seat0: Starting
[+0.02s] DEBUG: Seat seat0: Creating user session
[+0.32s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.32s] DEBUG: User /org/freedesktop/Accounts/User1000 added
[+0.33s] DEBUG: Seat seat0: Creating display server of type x
[+0.33s] DEBUG: Could not run plymouth --ping: Failed to execute child process "plymouth" (No such file or directory)
[+0.33s] DEBUG: Using VT 7
[+0.33s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.33s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+0.33s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0
[+0.33s] DEBUG: DisplayServer x-0: Launching X Server
[+0.33s] DEBUG: Launching process 2511: /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.33s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+0.33s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.33s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+1.24s] DEBUG: Got signal 10 from process 2511
[+1.24s] DEBUG: DisplayServer x-0: Got signal from X server :0
[+1.24s] DEBUG: DisplayServer x-0: Connecting to XServer :0
********** [+1.41s] DEBUG: DisplayServer x-0: Error connecting to XServer :0
[+1.41s] DEBUG: Process 2511 exited with return value 1
[+1.41s] DEBUG: DisplayServer x-0: X server stopped
[+1.41s] DEBUG: Releasing VT 7
[+1.41s] DEBUG: DisplayServer x-0: Removing X server authority /var/run/lightdm/root/:0
[+1.41s] DEBUG: Seat seat0: Display server stopped
[+1.41s] DEBUG: Seat seat0: Stopping session
[+1.41s] DEBUG: Seat seat0: Session stopped
[+1.41s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+1.41s] DEBUG: Seat seat0: Active display server stopped, starting greeter
[+1.41s] DEBUG: Seat seat0: Creating greeter session
[+1.41s] DEBUG: Seat seat0: Creating display server of type x
[+1.41s] DEBUG: Using VT 7
[+1.41s] DEBUG: Seat seat0: Starting local X display on VT 7
[+1.41s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+1.41s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0
[+1.41s] DEBUG: DisplayServer x-0: Launching X Server
[+1.42s] DEBUG: Launching process 2539: /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+1.42s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+2.21s] DEBUG: Got signal 10 from process 2539
[+2.21s] DEBUG: DisplayServer x-0: Got signal from X server :0
[+2.21s] DEBUG: DisplayServer x-0: Connecting to XServer :0
[+2.36s] DEBUG: DisplayServer x-0: Error connecting to XServer :0
[+2.36s] DEBUG: Process 2539 exited with return value 1
[+2.36s] DEBUG: DisplayServer x-0: X server stopped
[+2.36s] DEBUG: Releasing VT 7
[+2.36s] DEBUG: DisplayServer x-0: Removing X server authority /var/run/lightdm/root/:0
[+2.36s] DEBUG: Seat seat0: Display server stopped
[+2.36s] DEBUG: Seat seat0: Stopping; greeter display server failed to start
[+2.36s] DEBUG: Seat seat0: Stopping
[+2.36s] DEBUG: Seat seat0: Stopping session
[+2.36s] DEBUG: Seat seat0: Session stopped
[+2.36s] DEBUG: Seat seat0: Stopped
[+2.36s] DEBUG: Required seat has stopped
[+2.36s] DEBUG: Stopping display manager
[+2.36s] DEBUG: Display manager stopped
[+2.36s] DEBUG: Stopping daemon
[+2.36s] DEBUG: Seat seat0: Stopping session
[+2.36s] DEBUG: Exiting with return value 1

For comparison, here is a lightdm log from a successful boot:

[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.18.3, UID=0 PID=2332
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/01_debian.conf
[+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG:   [SeatDefaults] is now called [Seat:*], please update this configuration
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.00s] DEBUG: Registered seat module xlocal
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Registered seat module unity
[+0.02s] DEBUG: Monitoring logind for seats
[+0.02s] DEBUG: New seat added from logind: seat0
[+0.02s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.02s] DEBUG: Seat seat0: Starting
[+0.02s] DEBUG: Seat seat0: Creating user session
[+0.32s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.32s] DEBUG: User /org/freedesktop/Accounts/User1000 added
[+0.33s] DEBUG: Seat seat0: Creating display server of type x
[+0.33s] DEBUG: Could not run plymouth --ping: Failed to execute child process "plymouth" (No such file or directory)
[+0.33s] DEBUG: Using VT 7
[+0.33s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.33s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log
[+0.33s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0
[+0.33s] DEBUG: DisplayServer x-0: Launching X Server
[+0.33s] DEBUG: Launching process 2513: /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.33s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0
[+0.33s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.33s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+1.24s] DEBUG: Got signal 10 from process 2513
[+1.24s] DEBUG: DisplayServer x-0: Got signal from X server :0
[+1.24s] DEBUG: DisplayServer x-0: Connecting to XServer :0
********** [+1.26s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+1.26s] DEBUG: Session pid=2536: Started with service 'lightdm-autologin', username 'bruno'
[+1.28s] DEBUG: Session pid=2536: Authentication complete with return value 0: Success
[+1.28s] DEBUG: Seat seat0: Session authenticated, running command
[+1.28s] DEBUG: Registering session with bus path /org/freedesktop/DisplayManager/Session0
[+1.29s] DEBUG: Session pid=2536: Running command /etc/X11/Xsession default
[+1.29s] DEBUG: Creating shared data directory /var/lib/lightdm/data/bruno
[+1.29s] DEBUG: Session pid=2536: Logging to .xsession-errors
[+1.29s] DEBUG: Activating VT 7
[+1.29s] DEBUG: Activating login1 session 1
[+1.29s] DEBUG: Seat seat0 changes active session to 1
[+1.29s] DEBUG: Session 1 is already active

I marked the first line that's different between the two lightdm logs with some asterisks.

Before I jump ship and switch from lightdm to slim (which I've never used), I'd like to try troubleshooting my system as currently configured. Maybe lightdm is innocent and this is actually an X issue despite the benign-appearing X log?

Any idea why lightdm is failing? Now I have access to whatever logs we need.

P.S. I tried bbatten's idea but no luck. When boot hangs this way, computer does not respond to anything except power button and SysRq key.

Last edited by GNUser (2018-03-29 19:22:22)

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#9 2018-03-29 19:01:02

siva
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Registered: 2018-01-25
Posts: 186  
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Re: occasional boot hang on ascii [SOLVED]

I had a very similar issue to yours in Ubuntu 14.04.  The only difference is that it produced the error on every reboot, not just random ones.  I kinda lost faith in lightdm afterwards, and began a full transition to either slim or console login.

I wonder if the 14.04 and ascii packages are based on the same lightdm version.

Last edited by siva (2018-03-29 19:01:24)

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#10 2018-03-29 20:35:52

rolfie
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Registered: 2017-11-25
Posts: 48  

Re: occasional boot hang on ascii [SOLVED]

siva wrote:

I wonder if the 14.04 and ascii packages are based on the same lightdm version.

Don't think so. I got version 1.18.3 under ASCII.

Interestingly I have quite the same configuration, ASCII upgraded from Jessie, Mate and lightdm. No issues so far on my desktop PC.

What happens if you disable ntp?

Good luck, rolfie

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#11 2018-03-29 21:02:36

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

I will give slim a try. If problem recurs with slim, then maybe xorg is to blame? I still think ntp is a red herring, but will try disabling it if all else fails.

Last edited by GNUser (2018-03-30 03:15:45)

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#12 2018-03-29 21:11:38

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

Problem recurred with slim. Darn. I guess lightdm is innocent.

I'll try the other things but am running out of hope of nailing down this issue.

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#13 2018-03-29 21:17:17

fsmithred
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Registered: 2016-11-25
Posts: 928  

Re: occasional boot hang on ascii [SOLVED]

The message about 'seat' makes me think of systemd-related things.

Which libpolkit packages are installed?
consolekit or elogind?
Is libpam-elogind installed?

I have no idea why it would be intermittent.

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#14 2018-03-30 03:12:25

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

Hi, fsmithred. Thanks for piping in. All these packages are installed on my ASCII partition:

Packages with 'libpolkit' in name:
libpolkit-agent-1-0:amd64 0.105-18+devuan2.4
libpolkit-backend-1-0-elogind:amd64 0.105-18+devuan2.4
libpolkit-gobject-1-0-elogind:amd64 0.105-18+devuan2.4
libpolkit-qt-1-1:amd64 0.112.0-5
libpolkit-qt5-1-1:amd64 0.112.0-5

Packages with 'consolekit' in name:
consolekit 0.4.6-6

Packages with 'elogind' in name:
elogind 234.4-1+devuan1.5
libelogind0:amd64 234.4-1+devuan1.5
libpam-elogind:amd64 234.4-1+devuan1.5
libpolkit-backend-1-0-elogind:amd64 0.105-18+devuan2.4
libpolkit-gobject-1-0-elogind:amd64 0.105-18+devuan2.4

I honestly know very little about these packages, so don't know why these particular ones are installed.

These are the only packages on my Devuan Jessie partition, which always boots reliably:

Packages with 'libpolkit' in name:
libpolkit-agent-1-0:amd64 0.105-9+devuan1
libpolkit-backend-1-0:amd64 0.105-9+devuan1
libpolkit-gobject-1-0:amd64 0.105-9+devuan1
libpolkit-qt-1-1 0.103.0-1

Packages with 'consolekit' in name:
consolekit 0.4.6-5

Packages with 'elogind' in name:
none

Last edited by GNUser (2018-03-30 03:29:44)

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#15 2018-03-30 03:52:46

golinux
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Registered: 2016-11-25
Posts: 1,371  

Re: occasional boot hang on ascii [SOLVED]

GNUser wrote:

I honestly know very little about these packages, so don't know why these particular ones are installed.

I don't have a clear grasp of the specifics but I do know that different display managers require different backends.  And an upgrade creates more problems than a new install. It has to do with the replacement of udev with eudev.  This post might shed some light on your problem.  fsmithred is one of the best sources for specifics.

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#16 2018-03-30 04:06:44

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

fsmithred and golinux, thank you both very much. Based on the simple word or in fsmithred's post and golinux's link, I realized that I don't need both consolekit and elogind.

I tried uninstalling elogind (to simulate the package lineup in my problem-free Devuan Jessie partition) but doing so would force the removal of a truckload of packages including most of MATE. Therefore, I uninstalled consolekit. So far no negative consequences and I've booted my system 20 times for testing without any "hung" boots so far (using lightdm from ascii's repo). Fingers crossed...

fsmithred, is it possible that the intermittent nature of my issue was because of a race condition between elogind and consolekit?

Last edited by GNUser (2018-03-30 12:47:12)

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#17 2018-03-30 05:06:33

golinux
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Registered: 2016-11-25
Posts: 1,371  

Re: occasional boot hang on ascii [SOLVED]

@GNUser . . . that's good news.  Keeping fingers crossed that you've seen the last of hung reboots.  Sorting this conflict consistently is one of the last things holding up the next release.

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#18 2018-03-30 12:46:41

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

No luck. Problem struck again first boot this morning. Uninstalling consolekit was not the answer.

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#19 2018-03-30 14:31:57

catprints
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Registered: 2016-11-30
Posts: 114  

Re: occasional boot hang on ascii [SOLVED]

Perhaps totally unrelated, but after I uninstalled elogind I had to run pam-auth-update and checked or unchecked some item(s)? I don't know if this relates to booting. Just a thought.


"The obstacle is the path."

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#20 2018-03-30 14:51:50

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

Thanks, catprints. I did it just now and everything was checked.

So a recap of where I am at this point:
1. Tried using slim instead of lightdm, but problem recurred so I'm back on lightdm.
2. Uninstalled consolekit. Problem recurred afterwards but I'm leaving consolekit uninstalled since it seems superfluous.
3. Ran pam-auth-update as root. Everything is checked in the prompt.
4. Did full system upgrade again this morning.

I'll update the thread when I have something new to share.

Last edited by GNUser (2018-03-30 14:52:58)

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#21 2018-03-30 21:06:17

ralph.ronnquist
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From: Clifton Hill, Victoria, AUS
Registered: 2016-11-30
Posts: 276  

Re: occasional boot hang on ascii [SOLVED]

From the log snippets, it looks to me to be an X issue, that after launch, X says it's ready (signals) before it's actually waiting for connections. So sometimes it fails when the connection attempt is made. This causes lightdm to try another launch, but the second launch fails before giving any signal. So now lightdm is awaiting the signal from X, while the first X is sitting there waiting for connections.

If you would have a side entrance (eg ssh) ot the system you could check up if it might be this situation.

But I don't really know what to do about it. If any part of this is scripted, eg lightdm, it might be possible to insert a delay between receiving the ready signal and attempting a connection. Or something.

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#22 2018-03-31 00:23:28

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

Thanks, ralph.ronnquist. Inserting a delay between X's ready signal and lightdm's connection attempt sounds like a promising hack, but beyond my (current) skills.

I also thought of downgrading X to the version from Devuan Jessie, which apparently never signaled before it was actually ready for incoming connections. I'm trying the downgrade now but am quickly finding myself in dependency hell.

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#23 2018-03-31 01:29:35

GNUser
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Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

Problem just recurred despite 1-4 in post #20.

I'm giving up on getting X and a display manager to consistently play nice. Will try my luck with startx, hopefully it will be more consistent.

Last edited by GNUser (2018-03-31 11:43:40)

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#24 2018-03-31 04:10:50

GNUser
Member
Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

So far so good with startx. Here's what I did:

1. sudo apt-get install xinit (the xinit package contains the startx executable)
2. sudo apt-get purge lightdm
3. In /etc/inittab, comment out this line: 1:2345:respawn:/sbin/getty 38400 tty1
4. In /etc/inittab, add this line for autologin: 1:2345:respawn:/bin/login -f bruno tty1 </dev/tty1 >/dev/tty1 2>&1 (use your username instead of bruno, of course)
5. To run startx automatically upon login, add startx to ~/.profile

Hopefully the miscommunication between X and display manager (i.e., X sending a signal that it is ready for lightdm/slim to connect when it isn't actually ready) does not happen between X and startx. I'll mark as solved for now. If problem recurs I'll post again and remove the "solved" tag.

Last edited by GNUser (2018-03-31 11:47:56)

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#25 2018-03-31 14:00:52

GNUser
Member
Registered: 2017-03-16
Posts: 423  

Re: occasional boot hang on ascii [SOLVED]

Problem happens sometimes with startx as well. At least startx produces a (helpful?) error message when it happens:

screenshot.jpg

The interesting bit is "intel_do_flush_locked failed: Invalid argument" of course. I did some duck-ducking and it sounds like this could be a kernel bug. If so, this is extremely strange because I'm running the same kernel in ascii that I was running in jessie without any issues (I'm using the older kernel 3.16.51-3+deb8u1 because ascii's default kernel causes some graphics artifacts on my machine: https://dev1galaxy.org/viewtopic.php?id=1905).

Last edited by GNUser (2018-03-31 16:50:41)

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