postponed output on intel graphic with recent mesa & xorg-server

[Stephan Raue]

Hi all,

with recent Mesa (git from 19.02.2010), xorg server 
(git://anongit.freedesktop.org/~krh/xserver dri2-invalidate branch), 
xorg-video-intel from 13.02.2010 i have an very postponed output on my 
Thinkpad X200t.

in my Xorg.log i see a lot of follow messages:

[3904117.243] (EE) intel(0): Failed to submit batch buffer, expect 
rendering corruption or even a frozen display: Bad file descriptor.
[3904117.277] (WW) intel(0): flip queue failed: Device or resource busy
[3904117.277] (WW) intel(0): Page flip failed: Device or resource busy
[3904117.344] (WW) intel(0): flip queue failed: Device or resource busy
[3904117.344] (WW) intel(0): Page flip failed: Device or resource busy

what can be wrong?

greetings

Stephan

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