Dev1 Galaxy Forum / How does devuan choose which video drivers it uses?

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:55:38 +0000

Head_on_a_Stick wrote:

Doesn't say.
I don't like the -configure option for the same reason I don't like most abstractions — they introduce the possibility of new bugs and vulnerabilities whilst adding no new features. Why would anybody want that?

Ive never had an issue with it, maybe newer hardware might.

Re: How does devuan choose which video drivers it uses?

dummy@example.com (Head_on_a_Stick) — Sat, 09 Oct 2021 15:46:59 +0000

Doesn't say.

I don't like the -configure option for the same reason I don't like most abstractions — they introduce the possibility of new bugs and vulnerabilities whilst adding no new features. Why would anybody want that?

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:42:48 +0000

Head_on_a_Stick wrote:

From the man page (added emphasis):
-configure
When this option is specified, the Xorg server loads all video
drive modules, probes for available hardware, and writes out
an initial xorg.conf(5) file based on what was detected. This
option currently has some problems on some platforms, but in
most cases it is a good way to bootstrap the configuration
process.
So watch out for that

Pays to read the documentation, what platforms?

Re: How does devuan choose which video drivers it uses?

dummy@example.com (Head_on_a_Stick) — Sat, 09 Oct 2021 15:37:44 +0000

From the man page (added emphasis):

-configure
When this option is specified, the Xorg server loads all video
drive modules, probes for available hardware, and writes out
an initial xorg.conf(5) file based on what was detected. This
option currently has some problems on some platforms, but in
most cases it is a good way to bootstrap the configuration
process.

So watch out for that

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:30:36 +0000

Head_on_a_Stick wrote:

What do you actually want to change?

well that is not what the OP was asking, i dont want to change anything but Xorg -configure will give a conf file to see what is configured.

example:

Section "ServerLayout"
	Identifier     "X.org Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
	ModulePath   "/usr/lib/xorg/modules"
	FontPath     "/usr/share/fonts/X11/misc"
	FontPath     "/usr/share/fonts/X11/cyrillic"
	FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
	FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
	FontPath     "/usr/share/fonts/X11/Type1"
	FontPath     "/usr/share/fonts/X11/100dpi"
	FontPath     "/usr/share/fonts/X11/75dpi"
	FontPath     "built-ins"
EndSection

Section "Module"
	Load  "glx"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
EndSection

Section "Device"
        ### Available Driver options are:-
        ### Values: : integer, : float, : "True"/"False",
        ### : "String", : " Hz/kHz/MHz",
        ### : "%"
        ### [arg]: arg optional
        #Option     "SWcursor"           	# []
        #Option     "HWcursor"           	# []
        #Option     "NoAccel"            	# []
        #Option     "ShadowFB"           	# []
        #Option     "VideoKey"           	# 
        #Option     "WrappedFB"          	# []
        #Option     "GLXVBlank"          	# []
        #Option     "ZaphodHeads"        	# 
        #Option     "PageFlip"           	# []
        #Option     "SwapLimit"          	# 
        #Option     "AsyncUTSDFS"        	# []
        #Option     "AccelMethod"        	# 
        #Option     "DRI"                	# 
	Identifier  "Card0"
	Driver      "nouveau"
	BusID       "PCI:1:0:0"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	SubSection "Display"
		Viewport   0 0
		Depth     1
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     4
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     8
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     15
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     16
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Re: How does devuan choose which video drivers it uses?

dummy@example.com (Head_on_a_Stick) — Sat, 09 Oct 2021 15:27:49 +0000

What do you actually want to change?

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:22:51 +0000

Head_on_a_Stick wrote:
Write your own configuration snippet. It's not difficult.
So you are saying Xorg -configure is useless in my situation?

Re: How does devuan choose which video drivers it uses?

dummy@example.com (Head_on_a_Stick) — Sat, 09 Oct 2021 15:21:50 +0000

Write your own configuration snippet. It's not difficult.
EDIT: let's just agree to disagree about this and let the OP make their own mind up. I don't have the energy to argue.

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:19:21 +0000

Head_on_a_Stick wrote:
hevidevi wrote:
If it was useless then why is it a part of the Debian wikipedia.
Because the advice on that page is ancient and hasn't been updated to reflect the current situation.
All of the (DDX) video drivers supply their own configuration snippets that can be copied and modified as needed so there really is no need fot the --configure option at all.
EDIT:
empty@P14s:~ $ ls /usr/share/X11/xorg.conf.d/ 10-amdgpu.conf 10-quirks.conf 10-radeon.conf 40-libinput.conf 70-wacom.conf empty@P14s:~ $
^ Copy any of those files to /etc/X11/xorg.conf.d/ and modify them as needed.
Okay and if some of those files are not present?
~ > ls /usr/share/X11/xorg.conf.d/ 10-quirks.conf 40-libinput.conf 70-synaptics.conf

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:16:58 +0000

Head_on_a_Stick wrote:
hevidevi wrote:
If it was useless then why is it a part of the Debian wikipedia.
Because the advice on that page is ancient and hasn't been updated to reflect the current situation.
All of the (DDX) video drivers supply their own configuration snippets that can be copied and modified as needed so there really is no need fot the --configure option at all.
But it successfully describes the usage of X on my system.

Re: How does devuan choose which video drivers it uses?

dummy@example.com (Head_on_a_Stick) — Sat, 09 Oct 2021 15:14:17 +0000

hevidevi wrote:
If it was useless then why is it a part of the Debian wikipedia.
Because the advice on that page is ancient and hasn't been updated to reflect the current situation.
All of the (DDX) video drivers supply their own configuration snippets that can be copied and modified as needed so there really is no need fot the --configure option at all.
EDIT:
empty@P14s:~ $ ls /usr/share/X11/xorg.conf.d/ 10-amdgpu.conf 10-quirks.conf 10-radeon.conf 40-libinput.conf 70-wacom.conf empty@P14s:~ $
^ Copy any of those files to /etc/X11/xorg.conf.d/ and modify them as needed.

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 15:08:52 +0000

xorg -configure is not useless. You can use it to further tweak your X settings.
If it was useless then why is it a part of the Debian wikipedia.
If xorg.conf is missing for some reason, Xorg will probe your hardware on every startup. Though this works fine in most cases, some settings remain inaccessible. To create a starting point for customization, do the following.
Switch to a console as root (not a terminal emulator in X), then run:
# /etc/init.d/gdm stop || /etc/init.d/gdm3 stop || /etc/init.d/kdm stop || /etc/init.d/xdm stop || /etc/init.d/lightdm stop $ cd /etc/X11/ # Xorg -configure

Re: How does devuan choose which video drivers it uses?

dummy@example.com (Head_on_a_Stick) — Sat, 09 Oct 2021 14:41:57 +0000

For the kernel drivers udev will (hopefully) detect the hardware and load the appropriate driver.
X also probes the hardware to determine the correct DDX & Mesa drivers. Don't use Xorg --configure, it's useless. Just write your own configuration snippets if you need to change any of the autodetected options.
EDIT: for Intel hardware you should be using the modesetting DDX driver because it's far less buggy than Intel's option. That's why you had to force the Intel driver

Re: How does devuan choose which video drivers it uses?

dummy@example.com (hevidevi) — Sat, 09 Oct 2021 13:04:38 +0000

https://wiki.debian.org/Xorg#Configure_X

How does devuan choose which video drivers it uses?

dummy@example.com (alphalpha) — Thu, 30 Sep 2021 15:28:38 +0000

So i always have a multiple drivers installed on my system, because i use the iso on multiple machines
vesa, intel, nouveau, radeon etc
Since there is no config file in /etc/X11 that specifically states what to use, i am actually not sure which one of those i might be using at the moment
It has always worked fine for me until last week when i had a new machine (old hardware) and i had to specifically tell it to use the intel driver
So i am asking myself, how does the system decide what to use when there is no config file?