[Bug 75502] [SNB, IVB] Page flips hang indefinitely, apparently waiting for mmio writes that never happen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75502

--- Comment #10 from Daniel Vetter <daniel at ffwll.ch> ---
(In reply to comment #9)
> I can confirm that it didn't occur with kernel 3.5.0, libdrm-2.4.46, Mesa
> 9.1.3, Xorg server 1.11.4 and DDX 2.21.6. It does occur now that I've pulled
> forward from Fedora 16 with backports to Fedora 20.
> 
> If there are good starting points to try, I can take a machine backwards and
> see if that improves matters; I'd need to know which bits to change, though.

The only relevant bits are the kernel and the ddx (ddx is less likely). At lot
of stuff happened since 3.5. so I would only bother with traiging/bisecting if
you can somewhat readily reproduce this. No guess as to the actual culprit from
my side.

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