[BUG][REGRESSION] i915 gpu hangs under load

[Martin Kepplinger]

Hi

I know something similar is here: 
https://bugs.freedesktop.org/show_bug.cgi?id=100110 too.

But this is rc3 and my machine is totally *not usable*. Let me be 
annoying :) I hope I can help:

Since rc1 I get gpu hangs and resets under load: This is almost 
certainly a kernel issue. 4.10 is fine.
I keep a debian stable userspace. nouveau is running on this machine 
too.

Mar 22 09:17:01 martin-laptop kernel: [ 2409.538706] [drm] GPU HANG: 
ecode 7:0:0xf3cffffe, in gnome-shell [1869], reason: Hang on render 
ring, action: reset
Mar 22 09:17:01 martin-laptop kernel: [ 2409.538711] [drm] GPU hangs can 
indicate a bug anywhere in the entire gfx stack, including userspace.
Mar 22 09:17:01 martin-laptop kernel: [ 2409.538713] [drm] Please file a 
_new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Mar 22 09:17:01 martin-laptop kernel: [ 2409.538714] [drm] drm/i915 
developers can then reassign to the right component if it's not a kernel 
issue.
Mar 22 09:17:01 martin-laptop kernel: [ 2409.538715] [drm] The gpu crash 
dump is required to analyze gpu hangs, so please always attach it.
Mar 22 09:17:01 martin-laptop kernel: [ 2409.538716] [drm] GPU crash 
dump saved to /sys/class/drm/card0/error
Mar 22 09:17:01 martin-laptop kernel: [ 2409.538768] drm/i915: Resetting 
chip after gpu hang
Mar 22 09:17:09 martin-laptop kernel: [ 2417.537886] drm/i915: Resetting 
chip after gpu hang
Mar 22 09:17:17 martin-laptop kernel: [ 2425.537152] drm/i915: Resetting 
chip after gpu hang
Mar 22 09:17:25 martin-laptop kernel: [ 2433.536407] drm/i915: Resetting 
chip after gpu hang
Mar 22 09:17:33 martin-laptop kernel: [ 2441.539674] drm/i915: Resetting 
chip after gpu hang


Furthermore, there are weird, small display distortions occuring. I 
don't get any log about them and
don't have a screenshot. Well. Nevermind. Please fix 4.11 and CC anyone 
I forgot.


thanks

              martin
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