[Bug 66963] r600: linux v3.11.0-RC isn't booting with radeon.dpm=1 option in grub

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66963

--- Comment #126 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #124)
> I've noticed, that while watching youtube videos, sometimes (actually rather
> often) everything freezes. Looks like Xorg crash. It tries to recover but
> screen freezes, though mouse is working and sound (probably everything else
> is alive).
> 
> Dmesg is flooded with messages:
> [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB !
> radeon 0000:01:00.0: couldn't schedule ib

That's a GPU lock up which may not be related to dpm.  I recently fixed an
alignment issue with command buffers that may fix these hangs for you.  you'll
need this patch for libdrm:
http://cgit.freedesktop.org/mesa/drm/commit/?id=58d008883165ba35c83041fa9ed84937163d5f76
and this patch for mesa:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=a81beee37e0dd7b75422448420e8e8b0b4b76c1e

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