[Bug 90259] [gen2] Incoherent batch buffers, kernel w/a is n/a and no pin-ioctl to w/a

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90259

--- Comment #6 from tka <tka at kamph.org> ---
Created attachment 116186
  --> https://bugs.freedesktop.org/attachment.cgi?id=116186&action=edit
/sys/class/drm/card0/error

(In reply to Chris Wilson from comment #5)
> Something overwrote at least the first 32MiB of the GTT with ~0.

Now I can say that this overwriting happens, but very rarely. Most of the time,
this does not happen. The GPU hang however is still present every time. Here is
a current /sys/class/drm/card0/error (Linux 4.0.4, xf-86-video-intel
git-fb1643f0f904eb258da71cd0b8deb8d3ec6dafed).

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