Since I upgraded to 12.04 in April, I have had mouse issues.
- When I first log in, my mouse works fine (i.e. I can click and launch an application, or click-and-drag on the desktop).
- After I launch an application, for the most part I can no longer click on anything. Sometimes I can click the title bar at the top (time, sound, etc. in the task bar).
- My keyboard still seems to work. I can alt+tab, or alt+ctrl+delete, or tab through widgets.
This happens for me on every single log in. To fix the problem, I have to ALT+CTRL+DEL, then log out, then log back in. After that, my mouse works fine.
Is there anything like xprop or xwininfo that can tell me what has stolen my mouse? evtest still shows the mouse events - the desktop simply doesn't respond. Does anyone have any solutions for this? It seems similar to this bug: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/41301, but it's not "sporadic".