Comment 34 for bug 511844

Apparently evtest only works for pointer devices while X isn't running. Anyway, with X turned off temporarily I can get useful output from it. Apparently this is a kernel issue, and not an X issue, since I can replicate the bug without X.

Steps to reproduce:

1) plug in a tablet (first time since boot)
2) sudo evtest /dev/input/wacom
3) scribble on the tablet and note events received
4) unplug tablet
5) plug tablet back in
6) note that events are no longer received by evtest when you manipulate the tablet

Once the tablet is unplugged, the tablet driver remains in a non-working state until reboot.