[Bug 89147] stuck on blitter ring GPU HANG: ecode 2:0x0000000a, in X

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89147

--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Harold Naparst from comment #4)
> I'll see if I can recover without rebooting.  Sometimes I can, and sometimes
> not.  The problem may be related to screen blanking, which can be fixed by
> using xset s.  In any event, whenever the screen turns off or sleeps, X
> crashes. 

Not quite, it is just the kernel failing to set up the link to the display. If
you try another modeset it may recover. Anyway, it is a different bug to the
GPU hang, please do file a separate report. Here drm.debug=6 is essential to
trying to work out why the modesetting failed.

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