After the latest update to Ubuntu you may have noticed that the mouse seems to get stuck when trying to go from one monitor to the other. The problem is the new “Sticky edges” settings. To fix this go to
System Settings->Displays
and flip the “Sticky edges” switch to “Off”
One response to “Ubuntu 12.04 Mouse Stops or Hangs When Going To Other Monitor”
Thanks for this tip. Just upgraded today and this was the only problem I had.