Here's my stack trace. dstack kept hanging, so I just ran gdb manually. This appears to be the same bug, but the workarounds don't help. This is a:
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Manhattan [Mobility Radeon HD 5430 Series] And the ioctl that loops is ioctl(13, 0xc00c645c, 0x7fff5a9fde00) = 0 Where 13 is /dev/ati/card0. fglrx is 2:8.960-0ubuntu1, x86_64, Ubuntu 12.04 ** Attachment added: "dstack.trace" https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/969860/+attachment/3221797/+files/dstack.trace -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969860 Title: fglrx uses 100% CPU when screen turns off (spinning in glXWaitVideoSyncSGI or glXSwapBuffers) To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/969860/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs