I had the same issue after quickly closing and reopening laptop's lid, and some times after standby.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1076393 Title: Unity freezes when a program uses a lot of CPU and I hover an item on the launcher To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1076393/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs