Comment 138 for bug 541511

I've searched for the information and this is what I've found (maybe it'll help):

http://bugs.archlinux.org/task/16974:
"Anyway the i855GM issues have just been radically fixed by Daniel Vetter, you can find the patch and the complete kernel sources archive here:http://www.iragan.com/linux/i855GM/"

If this doesn't help, (I don't know much about it but I've thought maybe this could be the solution): make alternative xorg + intel-driver for 855gm (which works) as a manual installation available for those who have such hardware.

Cheers,
Vlad