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lynch9

Member

Registered: 2024-07-17

Posts: 30  

nouveau regression on GK208B / GT 730 after kernel update

Posting this here for visibility. I already reported it against src linux and tagged it upstream.

After a kernel update on Devuan Excalibur, nouveau started misbehaving on my system with an NVIDIA GK208B / GeForce GT 730 [10de:1287]. Before that, the same machine was usable with nouveau.

What I am seeing is screen artifacts/pixelation, session instability, occasional return to login, and repeated nouveau GR/TRAP errors. The messages involve both Xorg and xfwm4, with repeated MULTIPLE_WARP_ERRORS and ILLEGAL_INSTR_ENCODING.

Hardware info:

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK208B [GeForce GT 730] [10de:1287] (rev a1)
Subsystem: Gigabyte Technology Co., Ltd Device [1458:3693]
Kernel driver in use: nouveau
Kernel modules: nouveau

Typical log pattern:

nouveau ... gr: TRAP
nouveau ... [MULTIPLE_WARP_ERRORS]
nouveau ... [ILLEGAL_INSTR_ENCODING]

One example from dmesg:

[  588.244769] nouveau 0000:01:00.0: gr: TRAP ch 4 [007fa3c000 xfwm4[2583]]
[  588.244777] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004 [MULTIPLE_WARP_ERRORS] warp 0009 [ILLEGAL_INSTR_ENCODING]

Right now I am testing with the XFCE compositor disabled to see whether that makes the session a bit less fragile.

If anyone else is on Excalibur with a Kepler-era NVIDIA card and nouveau, I’d be interested to hear whether recent kernels are behaving the same way for you.

Last edited by lynch9 (Today 14:18:02)

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Hey, it's lynchian9.
Feel free to reach out via email.

lynch9

Member

Registered: 2024-07-17

Posts: 30  

Re: nouveau regression on GK208B / GT 730 after kernel update

Small update: disabling the XFCE compositor seems to avoid the problem entirely here lol
At least on this machine, the regression looks related to compositing path rather than general display output.

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Hey, it's lynchian9.
Feel free to reach out via email.

Altoid

Member

Registered: 2017-05-07

Posts: 1,999  

Re: nouveau regression on GK208B / GT 730 after kernel update

Hello:

... disabling the XFCE compositor ...

Surprise!!! 8^P

XFCE native compositor is crap.
Try picom, works great.
https://pkginfo.devuan.org/cgi-bin/poli … .61.71.165

See this thread: https://dev1galaxy.org/viewtopic.php?id=6657
The TL;DR is here: https://dev1galaxy.org/viewtopic.php?pid=50429#p50429

Best,

A.