[Bug 107945] System crashes seconds after a GPU hang with kernel newer than 4.18

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107945

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
The dmesg from drmtip goes on for 300+s after the gpu hang, with no indication
of subsequent GPU malaise. As you have netconsole setup one thing you can try
is config DRM_I915_DEBUG_GEM to see if any sanity checks fails; make sure you
also have reboot on panic set.

As to a possible cause, could you try with intel_iommu=igfx_off

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