Comment 31 for bug 119635

Same here:

- Most of the time, when both users have been logged in for a while, i get this after only one switch-and-back cycle. When both users have just logged in, i have to repeat it a couple of times in order to get the freeze.
- Switching via the fast-switch applet and via the logout menu produces the same result.
- For both user A and B, screen locking when switching users is disabled.
- Killing X by pressing Ctrl-Alt-Backspace doesn't work, neither does restarting by pressing Ctrl-Alt-Delete
- It's not just a stalled gdm, the entire system freezes. For example, if i'm logged in on the computer via ssh, that session freezes too. Music still playing on one of the users (Amarok) will quit or stall.
- I use the open source ati driver.
- I do not have desktop effects (compiz) enabled. (I can not enable these; why this is is perhaps a related issue. Whenever i try (via preferences > appearance > tab visual effects), it says "desktop effects could not be enabled".)
- Removing ~/.kde doesn't help

Can i help by submitting output?