Bug 106592

Summary: 2nd GPU / screen not detected after driver / xorg update
Product: xorg Reporter: Atila Neves <atila.neves>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED MOVED QA Contact: Xorg Project Team <xorg-team>
Severity: blocker    
Priority: medium    
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description Atila Neves 2018-05-21 10:55:01 UTC 
This is on Arch Linux. After an update, my 2nd monitor was no longer detected. I downgraded nouveau to the Arch package version 1.0.15-2 (from 1.0.15-3) and the problem went away. I also had to downgrade xorg-server due to dependency issues, so it's possible the problem could be there and not in nouveau itself. My xorg-server package is now xorg-server-1.19.6+13+gd0d1a694f-2, down from xorg-server-1.20.0-2.

Both monitors work fine in the downgraded configuration, but only one works with the latest updates.

When things weren't working, /var/log/Xorg.0.log showed the message "failed to find screen to remove" for one of the GPUs. This is no longer the case after the downgrade.
Comment 1 lukasw41 2018-05-22 17:56:43 UTC 
This might be the same problem: https://bugs.freedesktop.org/show_bug.cgi?id=106586
Comment 2 Atila Neves 2018-05-23 12:07:00 UTC 
It might be the same problem, yes. It definitely looks similar.
Comment 3 Martin Peres 2019-12-04 09:39:36 UTC 
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