Bug 92327 - Tearing and drm_wait_vblank kernel log spam with reverse PRIME (intel+nouveau)
Summary: Tearing and drm_wait_vblank kernel log spam with reverse PRIME (intel+nouveau)
Status: NEW
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Nouveau Project
QA Contact: Xorg Project Team
Depends on:
Reported: 2015-10-07 07:22 UTC by Matthias Schiffer
Modified: 2015-10-07 08:26 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


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Description Matthias Schiffer 2015-10-07 07:22:33 UTC
Setup: I use reverse PRIME with a primary intel and a secondary nouveau card. I have enabled one output on each of the cards. The reverse PRIME (nouveau) output is set as primary output via xrandr.

Whenever there's a DRI user on the reverse PRIME screen, the following message gets written to my kernel log once for each buffer swap:

[drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value 0x7d, supported mask 0x7400003f

Both DRI2 and DRI3 cause this behaviour. I also see tearing on the nouveau output.

Depending on the exact setup (DRI2/DRI3, different DRI users), I also get slightly different messages:

[drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value 0x15d, supported mask 0x7400003f
[drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value 0x400015d, supported mask 0x7400003f


00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1)


* xserver 1.17.2
* xf86-video-intel 2.99.917-476-g4e668dd
* xf86-video-nouveau 1.0.11-31-g1ff13a9

I opened a bug report for the kernel first (see https://bugzilla.kernel.org/show_bug.cgi?id=105601 ), but was told that this is a userspace bug.
Comment 1 Fredy Neeser 2015-10-07 08:26:56 UTC
Same issue here on Fedora 22 with intel (LVDS) + nouveau (ext. monitor):

Bug 1243432 - KDE 5 dual monitor setup with intel+nouveau drivers causes journal to be flooded with errors "[drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value ..."

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