This problem resolved for me on several computers when I installed the stable xorg stack from the x-updates ppa:
https://launchpad.net/~ubuntu-x-swat/+archive/x-updates -- xorg is jerky, uses too much cpu, small display bugs https://bugs.launchpad.net/bugs/653851 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs