I was having the same problem as well. No new software was installed nor were changes made to the system. The only thing I did which made me begin having this issue was running Virtualbox. I removed the virtualbox modules with rmmod with no difference.
If I disconnected one monitor, the jumpy mouse cursor and choppy video would be smooth as it originally was. I would suggest trying this with the ATI Catalyst software package installed on your system (if it is). Be aware my issue was with the NVIDIA card or proprietary driver. Without modifying anything else, I found a solution that worked for me: 1. First: I am running the nvidia proprietary video driver, not GNU. 2. Run "NVIDIA X Server Settings" from KMenu -> System. 3. Disable second monitor 4. Reboot machine (I did not restart X or KDM in this instance; proprietary drivers tend to want you to have to reboot the system). 5. Run "NVIDIA X Server Settings" from KMenu -> System. 6. Re-enable second monitor. 7. Reboot machine (see notes in step 4). 8. All choppyness went away. Everything is smooth again. I'm wanting to know if doing something similar for your ATI cards fixes it or stays the same. Good luck and let me know. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/945749 Title: Mouse pointer jerky on login screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/945749/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
