@madbiologist: thanks for looking into it. I haven't upgraded to the A12 BIOS because the list of fixes and enhancements was very small and only mentioned it was a fix for some issues when upgrading to Windows 8. (Additionally, Dell doesn't provide a way to update the BIOS from Linux for this machine so upgrading it is a PITA.)
FWIW, compiz works fine on this machine after I did a complete reinstall of 14.04, so it was some issue with the upgrade process that I ran into, and that seems to be a common theme here. Perhaps the upgrade inadvertently left an old intel driver in place (eg with an invalid ABI) and so the system rejected it? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1268146 Title: Very high cpu usage for compiz in 14.04 (mesa incorrectly using llvmpipe) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1268146/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
