Okay, so we have similar drivers for our video cards, some of the output of
dmesg | grep fglrx is:
serialhex@multi-hex ~]$ dmesg | grep fglrx
1.845547] fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel.
1.878311] <6>[fglrx] Maximum main memory to use for locked dma buffers: 5776 MBytes.
1.878559] <6>[fglrx] vendor: 1002 device: 6760 count: 1
1.878882] <6>[fglrx] ioport: bar 4, base 0x9000, size: 0x100
1.879025] <6>[fglrx] Kernel PAT support is enabled
1.879048] <6>[fglrx] module loaded - fglrx 9.0.2 [Sep 20 2012] with 1 minors
if yours is the same then it might be a video card thing. i tried some opengl accelerated stuff (things from xscreensaver) thinking it might be some wonky stuff in rendering (i semi-remember something about using opengl to make rendering spiffier... though i could be hallucinating things) and that worked fine. I'm not sure what other information to provide at this time, let me knowwhat else i can do to resolve this. (i'm going to try rolling back my drivers... see if that works)