This problem is also occurring for me in 11.10 using stock packages (only PPAs I have installed have to do with postgresql stuff). I had upgraded kernels to fix issues with my desktop graphics, but the issue persists across 3.0, 3.1 and 3.2RC7. Makes games pretty much unplayable, meaning I have nothing to prevent me from being constructive. =(
This problem is also occurring for me in 11.10 using stock packages (only PPAs I have installed have to do with postgresql stuff). I had upgraded kernels to fix issues with my desktop graphics, but the issue persists across 3.0, 3.1 and 3.2RC7. Makes games pretty much unplayable, meaning I have nothing to prevent me from being constructive. =(