Thank you for helping. I have upgraded BIOS to F13 although it should only improve USB3.0 compatibilty. Lets wait for about a month for the problem to appear.
$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date F13 03/21/2012 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1265065 Title: Desktop freeze while drag-maximizing window To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1265065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
