[Bug 99977] [SNB iommu] GPU HANG: TLB page VTD translation generated an error

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99977

--- Comment #25 from Jan Nordholz <jckn at gmx.net> ---
Different approach: with some small modifications to push the i915 error state
into memory in human-readable form and then out of the machine using firewire
DMA, I was able to get my hands on a GPU error that seconds later led to a hard
freeze. Thus we can at least check whether the two forms of GPU hang I'm
experiencing (recoverable and non-recoverable) are actually the same error.

This one is now from a vanilla 4.11-rc2 without your patches, but I can repeat
again on a recent (and patched) drm-tip if that's helpful.

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