The problem is not Linux, Ubuntu, Compiz or your video card. I looked at www.x.org's bug reports and was directed to bugzilla. Sorry. Forgot to C&P the link.
This is a regression from an earlier Xorg bug. It was recently reopened. Priority: High Severity: Major. -- restricted drivers (ATI) causes Xorg memory leakage https://bugs.launchpad.net/bugs/353800 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs