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Tasklist

FS#74226 - [linux] nouveau display broken on laptops with both eDP and LVDS

Attached to Project: Arch Linux
Opened by Axel Gembe (ichundes) - Thursday, 24 March 2022, 12:24 GMT
Last edited by David Thurstenson (thurstylark) - Sunday, 10 April 2022, 06:25 GMT
Task Type Bug Report
Category Packages: Core
Status Closed
Assigned To No-one
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

Description:

nouveau causes display problems when a laptop has both eDP and LVDS but only the LVDS is connected. This behavior started in version 5.15 of the kernel in commit https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eca310e8924ab98c73b81dfd39e7dd553ceddfd

This bug has been reproduced on a couple of devices:

* GT216 see https://gitlab.freedesktop.org/drm/nouveau/-/issues/128
* GTX 460M see https://gitlab.freedesktop.org/drm/nouveau/-/issues/136
* Quadro K1000M see https://gitlab.freedesktop.org/drm/nouveau/-/issues/137

The fix for this is simple and has been included in drm-misc-next branch: https://cgit.freedesktop.org/drm/drm-misc/commit/drivers/gpu/drm/nouveau/nouveau_backlight.c?id=6b0076540faffd47f5a899bf12f3528c4f0e726b
This task depends upon

Closed by  David Thurstenson (thurstylark)
Sunday, 10 April 2022, 06:25 GMT
Reason for closing:  Fixed
Additional comments about closing:  >=5.15.33
Comment by Axel Gembe (ichundes) - Friday, 25 March 2022, 07:42 GMT
There is also another case (Quadro K5100M) on the Arch forums: https://bbs.archlinux.org/viewtopic.php?id=273326
Comment by Axel Gembe (ichundes) - Friday, 25 March 2022, 07:59 GMT
Another case: https://bbs.archlinux.org/viewtopic.php?id=274262
Comment by Axel Gembe (ichundes) - Monday, 04 April 2022, 04:29 GMT
Kernel 5.18-rc1 includes the fix. This still affects the 5.15 LTS kernel though.
Comment by Axel Gembe (ichundes) - Friday, 08 April 2022, 16:06 GMT
The fix has also been included in the 5.15.33 LTS kernel.
Comment by Axel Gembe (ichundes) - Friday, 08 April 2022, 16:17 GMT
also included in the new 5.16 and 5.17 releases so I'm going to close this because those will be available soon.

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