Smalltimer: Did you get x11 working? I needed to restart my miner, and everything I tried, sgminer for x11mod kept crashing.
I finally restarted the rig, and ran cgminer (on scrypt), and that ran fine. I then stopped cgminer, and immediately started sgminer (on x11mod), and it is working fine. cgminer must be setting something on the GPU that sgminer is not.