I can confirm Yulianto´s comment that disk-I/O is rising very high as well.
My system has almost the same properties that Nathan´s has. I will provide more Informations about my system if needed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1001550 Title: LibreOffice Calc causes high CPU usage in Xorg when displaying "marching ants" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1001550/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs