I have a similar problem (ubuntu 12.04-3), it occurred after upgrading the linux kernell to 3.8.0-32-generic. I tried different video drivers, but doesnt seem to help. Cinnamon works fine.
The odd thing is, sometimes it happens sometimes it doesnt, I started my laptop (optimus) this morning and there was smearing, I subsequently restarted and the smearing stopped. Doesnt make much sense to me either. ** Attachment added: "Xorg.0.log" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1244237/+attachment/3896752/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1244237 Title: Ubuntu 13.04 Unity desktop background smears when dragging windows To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1244237/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
