[Bug 80199] [hsw] GPU HANG: ecode 0:0x85dffffd stuck on render ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80199

--- Comment #8 from webstrand at gmail.com ---
On the current mainline kernel, 3.19-rc4 as of 2015-01-11, I still get the gpu
hang through a few different ways:

[   48.398180] [drm] stuck on render ring
[   48.398984] [drm] GPU HANG: ecode 7:0:0x85dffffd, in Xorg.bin [354], reason:
Ring hung, action: reset
[   48.398988] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[   48.398989] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[   48.398991] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[   48.398993] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[   48.398994] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[   48.399059] [drm:intel_pipe_set_base [i915]] *ERROR* pin & fence failed
[   48.404834] drm/i915: Resetting chip after gpu hang
[   54.389676] [drm] stuck on render ring
[   54.390431] [drm] GPU HANG: ecode 7:0:0x85dffffd, in Xorg.bin [354], reason:
Ring hung, action: reset
[   54.390500] [drm:intel_pipe_set_base [i915]] *ERROR* pin & fence failed
[   54.390513] [drm:i915_set_reset_status [i915]] *ERROR* gpu hanging too fast,
banning!
[   54.396341] drm/i915: Resetting chip after gpu hang

I can trigger this error only once after rebooting and then running the
command:

xrandr --output HDMI1 --off --output VIRTUAL1 --off --output eDP1 --mode
1920x1080 --pos 0x0 --rotate normal --output VGA1 --off

Starting chromium without the flag --disable-gpu always produces the error:

[  561.799135] [drm] stuck on render ring
[  561.799939] [drm] GPU HANG: ecode 7:0:0x85dfbff8, in chromium [917], reason:
Ring hung, action: reset
[  561.805793] drm/i915: Resetting chip after gpu hang

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