2.6.31-0.112.rc4.git3.fc12 on F11: flashing intel xorg driver

Hi, in order to debug https://bugzilla.redhat.com/show_bug.cgi?id=514918 I installed a rawhide kernel (2.6.31-0.112.rc4.git3.fc12). Unfortunately X flashes all the time which makes working graphically very difficult to impossible. But I need to test NetworkManager so I need to get into a non-flashing X somehow. Before I blindly upgrade half my system to rawhide, is there anything I could tune to fix this or maybe a minimal set of packages to upgrade to rawhide? I could perhaps ssh to the system in question, but part of the exercise is to get a working laptop with modbile broadband cababilities, so I do need a working X at the end :) -- Axel.Thimm at ATrpms.net