logout hangs gdm (when several users are logged in)

[nadavkav]

i have one user auto login. then i open two more users and i am able to switch between them easily.
now, when i logout one of the users...gdm hangs (i think) mouse is functioning but the keyboard does not.

i get blank screen (not black) and i can only hard reset to restart the system.

if i have only one user logged in, i can log it off with no errors :-)

this is after a smooth upgrade from 8.04 --> 8.10 (two days ago)
every thing else seems to works just fine :-)

[Sebastien Bacher (seb128)]

that's rather an xorg issue than a gdm one, what videocard and driver do you use?

[Bryce Harrington (bryce)]

[This is an automated message]

Hi nadavkav,

Please attach the output of `lspci -vvnn`, and attach your /var/log/Xorg.0.log file from after reproducing this issue. If you've made any customizations to your /etc/X11/xorg.conf please attach that as well.

[nadavkav (nadavkav)]

i think this is a duplicate to:
https://bugs.launchpad.net/ubuntu/+source/desktop-effects/+bug/88152

and all other bugs in its (88152) duplicate list.

btw, i use desktop-effects on the first user i log into.

this system lock down happens after fast switching between
already logged in users that are using the system for some time
(some times days)

we switch allot and then it hangs.