Created attachment 461725 [details] Xorg.0.log Description of problem: After minimising a window (compiz enabled, with Magic Lamp effect), the screen seemed a bit messed up: everything shifted around 1/3 to the left and wrapped around. I then moved some stuff around and it cleared up. I've seen this before on earlier kernels and Xorg drivers, but I think it really started at some point after KMS was introduced. Currently using: xorg-x11-drv-intel-2.12.0-8.fc14.x86_64 kernel-2.6.36-5.fc15 (built from Koji sources) libdrm-2.4.22-1.fc14.x86_64 mesa-dri-drivers-7.9-2.fc14.x86_64 With drm.debug=0x02 enabled, there were a number of messages of the form [drm:i915_driver_irq_handler], pipe b underrun in dmesg. No xorg.conf. dmesg and Xorg.0.log attached.
Created attachment 461727 [details] dmesg
Additional info: This is on Intel X3100 graphics on my notebook, just the built-in LVDS screen active, no external display attached.
This seems to be similar as bug 617617, and bug 694006.
Can't remember seeing this for a while now, so considering closing CURRENTRELEASE.