My machine also freezes completely, no mouse or keyboard response, but only in unity. it freezes mostly in firefox (klick on tab or link), but also in ubuntu software-center or chromium-browser (rare).
important: unity-2d works fine! I can browse the web in unity-2d without any freezes. I can play openarena (0.8.5-10) in unity-2d for hours without any freezes. so maybe its compiz or unity 3D related? machine specs: os: ubuntu 12.04 , 64bit cpu + gpu: Intel i5-3570K CPU mainboard: Gigabyte Z77M-D3H (F6 BIOS) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 64bit completely freezes frequently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/993187/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs