Bug 103243

Summary: 1.19.4 [REGRESSION] commit 388dc1aeac9acf2d51ad5103570beffd81d78b96 breaks PRIME synchronization
Product: xorg Reporter: Maik Freudenberg <hhfeuer>
Component: Driver/modesettingAssignee: Xorg Project Team <xorg-team>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: keithp
Version: unspecified   
Hardware: Other   
OS: All   
i915 platform: i915 features:

Description Maik Freudenberg 2017-10-12 15:32:35 UTC
breaks PRIME sync i.e. Optimus hardware with nvidia binary driver, PRIME output and Sync (nvidia-drm.modeset=1 kernel parameter) active.
Symptoms differ slightly depending on system.
e.g. running gdm/gnome after about 10 seconds the display gets frozen including mouse pointer and I can move around a second mouse pointer to move around but no screen updates occur any more. No error messages or warnings, the xserver is running fine, I can switch to text console and back or zap the xserver but no more screen updates.
Another user reported running lightdm it take 1 min to see a login but screen updates occur every 30sec.
Reverting this commit or deactivating PRIME Sync by setting nvidia-drm.modeset=0  returns the xserver to normal operation.
Comment 1 Adam Jackson 2017-10-12 16:34:57 UTC
Reverted from 1.19 branch, will be in 1.19.5 shortly.
Comment 2 Maik Freudenberg 2017-10-14 11:40:33 UTC
(In reply to Adam Jackson from comment #1)
> Reverted from 1.19 branch, will be in 1.19.5 shortly.

1.19.5 works fine.
Thank you

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