[Bug 70151] [snb blorp] GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70151

--- Comment #10 from Daniel Vetter <daniel at ffwll.ch> ---
(In reply to comment #9)
> Does anyone else here experience CPU/GPU performance drops when they
> experience these hangs? 

It takes up to a few seconds for the kernel to detect a hang (the gpu doesn't
really tell us, it simply stops doing stuff). So frame-freezing while that
happens is completely expected. And we also need to turbo-up the chip again,
which in some pathetic corner-cases also takes a while. 3.13 has some cool
tricks from Chris to help with the turboing.

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