[Bug 96894] stuck on render ring (v4.7-rc7 Sky Lake Integrated Graphics [8086:1916])

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96894

Bjørn Mork <bjorn at mork.no> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #13 from Bjørn Mork <bjorn at mork.no> ---
Issue still present in v4.10.0-rc6, with 24 failing attempts to reset the GPU
causing the display to hang for 414 seconds in total:

[22578.675066] [drm] GPU HANG: ecode 9:0:0x84dfbffc, in Xorg [1115], reason:
Hang on render ring, action: reset
[22578.675071] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[22578.675072] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[22578.675073] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[22578.675074] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[22578.675075] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[22578.675117] drm/i915: Resetting chip after gpu hang
[22578.675204] [drm] RC6 on
[22578.690808] [drm] GuC firmware load skipped
[22594.632570] drm/i915: Resetting chip after gpu hang
[22594.632799] [drm] RC6 on
[22594.648499] [drm] GuC firmware load skipped
[22614.664380] drm/i915: Resetting chip after gpu hang
[22614.664571] [drm] RC6 on
[22614.683429] [drm] GuC firmware load skipped
[22634.632106] drm/i915: Resetting chip after gpu hang
[22634.632359] [drm] RC6 on
[22634.646027] [drm] GuC firmware load skipped
[22652.679799] drm/i915: Resetting chip after gpu hang
[22652.679989] [drm] RC6 on
[22652.696463] [drm] GuC firmware load skipped
[22670.663733] drm/i915: Resetting chip after gpu hang
[22670.668684] [drm] RC6 on
[22670.683865] [drm] GuC firmware load skipped
[22688.647556] drm/i915: Resetting chip after gpu hang
[22688.658581] [drm] RC6 on
[22688.681845] [drm] GuC firmware load skipped
[22706.631362] drm/i915: Resetting chip after gpu hang
[22706.637003] [drm] RC6 on
[22706.657547] [drm] GuC firmware load skipped
[22722.631107] drm/i915: Resetting chip after gpu hang
[22722.631170] [drm] RC6 on
[22722.645082] [drm] GuC firmware load skipped
[22742.663136] drm/i915: Resetting chip after gpu hang
[22742.665635] [drm] RC6 on
[22742.682193] [drm] GuC firmware load skipped
[22760.647001] drm/i915: Resetting chip after gpu hang
[22760.649805] [drm] RC6 on
[22760.668163] [drm] GuC firmware load skipped
[22780.614816] drm/i915: Resetting chip after gpu hang
[22780.619130] [drm] RC6 on
[22780.637673] [drm] GuC firmware load skipped
[22800.646570] drm/i915: Resetting chip after gpu hang
[22800.650751] [drm] RC6 on
[22800.669378] [drm] GuC firmware load skipped
[22820.614457] drm/i915: Resetting chip after gpu hang
[22820.622438] [drm] RC6 on
[22820.641270] [drm] GuC firmware load skipped
[22834.630392] drm/i915: Resetting chip after gpu hang
[22834.636328] [drm] RC6 on
[22834.654929] [drm] GuC firmware load skipped
[22850.630252] drm/i915: Resetting chip after gpu hang
[22850.630428] [drm] RC6 on
[22850.646390] [drm] GuC firmware load skipped
[22868.614075] drm/i915: Resetting chip after gpu hang
[22868.614264] [drm] RC6 on
[22868.633856] [drm] GuC firmware load skipped
[22886.661904] drm/i915: Resetting chip after gpu hang
[22886.668489] [drm] RC6 on
[22886.684943] [drm] GuC firmware load skipped
[22906.629771] drm/i915: Resetting chip after gpu hang
[22906.635558] [drm] RC6 on
[22906.651226] [drm] GuC firmware load skipped
[22927.685275] drm/i915: Resetting chip after gpu hang
[22927.685369] [drm] RC6 on
[22927.701798] [drm] GuC firmware load skipped
[22944.645560] drm/i915: Resetting chip after gpu hang
[22944.651301] [drm] RC6 on
[22944.667156] [drm] GuC firmware load skipped
[22962.629440] drm/i915: Resetting chip after gpu hang
[22962.635535] [drm] RC6 on
[22962.651782] [drm] GuC firmware load skipped
[22982.661283] drm/i915: Resetting chip after gpu hang
[22982.666887] [drm] RC6 on
[22982.687104] [drm] GuC firmware load skipped
[22992.645253] drm/i915: Resetting chip after gpu hang
[22992.651314] [drm] RC6 on
[22992.667404] [drm] GuC firmware load skipped



Would it be possible to at least make the GPU reset work, like it used to do in
v4.8 and earlier?  The hang is of course annoying, but waiting for minutes and
ending up with X restarting is so much worse than the earlier behaviour that I
see it as a regression in itself.

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