I am running 13.04 with the linux-image-3.8.0-26-generic kernel and experienced this problem.
The best way I found to reproduce the problem systematically is by playing "Revenge of the Titans": after at most 5 minutes the system hung for a few seconds and afterward it was slow/choppy with video acceleration problems (GPU hung in the logs).
I tried linux-image-3.9.8-030908-generic and linux-image-3.9.9-030909-generic (saucy) from http://kernel.ubuntu.com/~kernel-ppa/mainline/ and they work fine: when playing, sometime they hang for a short time, but afterwards the system recovers 100%.
I am running 13.04 with the linux-image- 3.8.0-26- generic kernel and experienced this problem.
The best way I found to reproduce the problem systematically is by playing "Revenge of the Titans": after at most 5 minutes the system hung for a few seconds and afterward it was slow/choppy with video acceleration problems (GPU hung in the logs).
I tried linux-image- 3.9.8-030908- generic and linux-image- 3.9.9-030909- generic (saucy) from http:// kernel. ubuntu. com/~kernel- ppa/mainline/ and they work fine: when playing, sometime they hang for a short time, but afterwards the system recovers 100%.