[Intel-gfx] g33 + dual head = problems

[Andriy Gapon]

I have a DG33TL motherboard with G33 chipset.  I have two LCD monitors with native
resolutions of 1280x1024 (connected to analog output) and 1650x1050 (connected to
DVI/SDVO output).  I am running Fedora 16 (x86_64, KDE Desktop) on this hardware.
 Monitors are configured to appear side by side (for a total of 2960x1050),
virtual size is (auto-)configured to 4096 x 4096.

The setup works OK as long as I do not enable any form of KDE "desktop effects".
If I enable either OpenGL or XRender effects, then I start to get massive screen
corruptions.  In addition, in OpenGL mode the desktop becomes painfully slow.

Is there any hope to get the effects working via some configuration tweaks or
through updating the software?
Can the problem be related to some 2048x2048 limitation in G33?

Xorg.log is here: http://paste.lisp.org/display/129287
I can provide any additional information required.

Thank you.
-- 
Andriy Gapon