[Bug 99977] [SNB] [i915] GPU HANG: ecode 6:0:0x85fffffc, in aquaria [2893], reason: Hang on render ring, action: reset

[bugzilla-daemon at freedesktop.org]

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

--- Comment #14 from Chris Wilson <chris at chris-wilson.co.uk> ---
So assuming it is memcorruption with the GPU context state + iommu, do we have
a good idea when it started? Assuming it is memcorruption, the hard hang will
then just be an accident on clobbering something important, bisecting its
introduction is likely a wild goose chase. But if iommu used to work with this
game and now doesn't, that might be interesting. (Assuming it doesn't bisect to
some major feature enabling like turning on HW contexts without which mesa
simply won't work!)

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