Reverted the machine to Ubuntu Mate 15.04 without compiz, now the bug is gone. So it seems to depend on a running compiz above ubuntu 14.04 to mess up the graphics.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1458292 Title: Color smear and char loss from scrolling To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1458292/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs