[Bug 68718] [snb] vsync hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68718

--- Comment #8 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 93691
  --> https://bugs.freedesktop.org/attachment.cgi?id=93691&action=edit
/sys/class/drm/card0/error

Well, with the latest mesa (and 3.13-rc7, and chrome 32), I can't get gmail to
hang anymore by going into the compose screen. But not to be defeated, I loaded
up google maps, and as part of loading there were ~3 hangs until I managed to
close the tab. (I didn't have to do anything fancy, just load it... this is the
"maps preview" thing with google earth basically built into it.)

These were the relevant bits from the log:

[473527.324523] [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring
[473527.324531] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[473527.324534] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[473527.324535] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[473527.324537] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[473527.324538] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[473534.318239] [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring
[473541.315958] [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring

Not sure this is the same issue as the one from before -- if it's not, happy to
open another bug. I will go and check whether disabling rc6 helps now (although
that would be a workaround, not a solution).

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