[Bug 54226] [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54226

--- Comment #232 from samuel.rakitnican at gmail.com ---
(In reply to Chris Wilson from comment #192)
> (In reply to comment #191)
> > What information is most useful for these repeating issues, as it just
> > happened again:
> > 
> >  Sep 16 08:32:59 arrowsmithlap1 kernel: [1182242.139690] [drm] stuck on
> > render ring
> >  Sep 16 08:32:59 arrowsmithlap1 kernel: [1182242.139699] [drm] stuck on
> > blitter ring
> 
> So long as it is the same event, there is no more information we need other
> than testing feedback for an eventual workaround.

Is this the same bug?

$ journalctl -p 3 -b -1
Ruj 25 02:13:01 crnigrom kernel: [drm:fw_domains_get [i915]] *ERROR* render:
timed out waiting for forcewake ack request.
Ruj 25 02:13:01 crnigrom kernel: [drm:__gen6_gt_wait_for_thread_c0.isra.16
[i915]] *ERROR* GT thread status wait timed out
... [ repeated messages ] ...
Ruj 25 02:13:33 crnigrom kernel: [drm:fw_domains_get [i915]] *ERROR* render:
timed out waiting for forcewake ack request.
Ruj 25 02:13:33 crnigrom kernel: [drm:__gen6_gt_wait_for_thread_c0.isra.16
[i915]] *ERROR* GT thread status wait timed out
Ruj 25 02:13:34 crnigrom kernel: [drm:stop_ring [i915]] *ERROR* render ring :
timed out trying to stop ring
Ruj 25 02:13:34 crnigrom kernel: [drm:init_ring_common [i915]] *ERROR* render
ring initialization failed ctl 00000000 (valid? 0) head 00000000 tail 00000000
start 00000000 [expected 00000000]
Ruj 25 02:13:34 crnigrom kernel: [drm:i915_reset [i915]] *ERROR* Failed hw init
on reset -5
Ruj 25 02:13:34 crnigrom gnome-session[1823]: Unrecoverable failure in required
component gnome-shell.desktop

After which gnome crashes with "Oh No Something Is Wrong" screen

$ uname -r
4.1.7-200.fc22.x86_64

Hardware i3-2100 CPU/GPU

This bug is going on already for a long long time, but at least computer is not
hard freezing anymore, although gnome is crashing so any gtk applications
running doing something stalls.

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