Comment 13 for bug 78470

Can confirm system freezes on switching from user a to user b and then logging out user b. It doesn't happen all the time thought, but system doesn't respond on keyboard or mouse so I am forced to do a hard reboot. I am not running Compiz/Beryl.

$ lspci | grep Display
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)

$ uname -a
Linux dellbox 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux

(X)ubuntu 7.04 final