I don't think it's an duplicate of #717970. As written above, this issue is still not resolved for me with 3.5.0-23. Also the lost sync issue occurs even after fresh boot and not only after resume.
** This bug is no longer a duplicate of bug 717970 After sleep, key presses get lost and trackpad is jittery -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/896922 Title: Lenovo L520 - "psmouse.c: touchpad at isa0060/serio4/input0 lost sync" and stops working for seconds To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/896922/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs