> On Tue, 06 Sep 2011 15:11:12 +0200, Philipp Klaus Krause <
pkk@spth.de> wrote:
>
>> Here's the output from git-bisect:
>>
>> d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e is the first bad commit
>> commit d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e
>> Author: Keith Packard <
keithp@keithp.com>
>> Date: Thu Jul 28 14:47:14 2011 -0700
>>
>> drm/i915: Flush other plane register writes
>>
>> Writes to the plane control register are buffered in the chip until a
>> write to the DSPADDR (pre-965) or DSPSURF (post-965) register
>> occurs.
>
> Makes me wonder if this is some interaction between page flipping and
> frame buffer compression. Could you try turning it off with the
> following kernel command line parameter?
>
> i915.i915_enable_fbc=0
>