[Bug 58381] New: i915: GPU hangs after upgrade to 3.8.13 or 3.9

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=58381

           Summary: i915: GPU hangs after upgrade to 3.8.13 or 3.9
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.8.13
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
        AssignedTo: intel-gfx-bugs at lists.freedesktop.org
        ReportedBy: mezin.alexander at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No


I've enabled full hardware accelleration in Chromium, and before 3.8.13
everything worked fine. However, when I upgraded to 3.8.13, playing YouTube
videos sometimes cause GPU hang, choppy compositor and X crash later.

dmesg contains this message: [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer
elapsed... GPU hung

GPU:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)

It seems that the problem is introduced by this commit:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=b578b3a82d830e2170d403b1fb29b649e26a48fb

If I revert it, I don't experience GPU hangs again. The same happens for 3.9
kernels.

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