Comment 9 for bug 987498

I am seeing a problem with the same description (running Unity + compiz in precise (12.04), display manager hangs so that the mouse moves, and the keyboard allows me to get to tty1). My laptop is a lemu4 (lemur ultra) from system76 -- it uses Intel graphics. If I select Ubuntu 2D, I don't see the problem. But I like using Unity. I should probably spend some more time running 2D to check that it indeed does not occur there.

Today, every time I invoke "vi" in an xterm compiz hangs, using 100% of a cpu. The recovery ( Ctl + Alt + F1 to get to tty1, then "top" to check the compiz cpu use and get its pid, then sudo kill -9 <pid>, then "sudo service lightdm restart", then login to X-window environment) works without leading to new problems. If one doesn't kill compiz, a new one will be loaded by lightdm, leaving the orphan compiz to use an entire cpu. And if you hit the problem and don't kill the new compiz, you now have two cpus locked up.