[Bug 112341] [cfl iommu] GPU Hang with Gallium3D iris driver on FC31

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112341

--- Comment #4 from ryan at testtoast.com ---
Another very similar one. It seems this is happening semi-regularly and has
been with the last few 5.4-rc series kernels. I've discovered it always happens
during a 5-10 second hang where music will keep playing etc but input and the
display becomes unresponsive (makes sense with the GPU hang I guess.

Another log from the latest one for posterity - 

[ 6307.875466] DMAR: DRHD: handling fault status reg 2
[ 6307.875477] DMAR: [DMA Write] Request device [00:02.0] PASID ffffffff fault
addr fffffffefffbf000 [fault reason 07] Next page table ptr is invalid
[ 6315.062880] i915 0000:00:02.0: GPU HANG: ecode 9:1:0x85dffffb, in alacritty
[14310], hang on rcs0
[ 6315.062884] GPU hangs can indicate a bug anywhere in the entire gfx stack,
including userspace.
[ 6315.062885] Please file a _new_ bug report on bugs.freedesktop.org against
DRI -> DRM/Intel
[ 6315.062886] drm/i915 developers can then reassign to the right component if
it's not a kernel issue.
[ 6315.062887] The GPU crash dump is required to analyze GPU hangs, so please
always attach it.
[ 6315.062889] GPU crash dump saved to /sys/class/drm/card0/error
[ 6315.063909] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0

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