I had a similar problem when using an old KVM switch between mouse and computer. my solution was:
sudo sh -c 'echo options psmouse proto=imps > /etc/modprobe.d/kvm-fix' sudo modprobe -r psmouse sudo modprobe psmouse if it doesn't work for you, just do: sudo rm /etc/modprobe.d/kvm-fix sudo modprobe -r psmouse sudo modprobe psmouse and everything will be as it was. note that the name "kvm-fix" is just an arbitrary name, could be any non-used name actually. hope this helps. -- [hardy] ps2 mouse erratic - parity errors - lost synchronization errors https://bugs.launchpad.net/bugs/119194 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