I don't know if it helps, but I was looking though the system logs and in the Xorg log I see the following, a bunch of times repeating over and over, about 15 times.
SetGrabKeysState - enabled SetGrabKeysState - disabled -- Numeric keypad no longer works after upgrade https://bugs.launchpad.net/bugs/197589 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