I still get the XIO fatal IO error 11 with glxgears. kernel is 3.1.1 xserver-xorg-video-intel is 2.15.0-3 mesa 7.11-6 I think The flurries screensaver also locks up on waking sometimes. I'll try to get some error log or something but I have to hit the power button when it does and I haven't seen any errors in Xorg log besides the dri2swap bad drawable from a while ago.