Happens to me also when I launch trine2 game on linux steam. After a few seconds I get the GPU lockup error. Ubuntu 12.10; However if I use xfce I am able to experience the bug seconds later than with unity.
***uname -a*** Linux rumcajs-Satellite-A300 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:20:06 UTC 2013 i686 i686 i686 GNU/Linux ***lspci -nnk*** 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI RV620 [Mobility Radeon HD 3400 Series] [1002:95c4] Subsystem: Toshiba America Info Systems Device [1179:ff1c] Kernel driver in use: radeon Kernel modules: radeon -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/986524 Title: radeon 0000:02:00.0: GPU lockup CP stall for more than 10000msec To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/986524/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs