This sounds like the problem I'm having, except it's not restricted to the login screen and occurs randomly
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/363375 -- Cursor behaves oddly during logon (using Xinerama) https://bugs.launchpad.net/bugs/353098 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