I am also having this problem, typically when I wake my computer up from
suspend. The system starts up with a password screen for the user who
was active when the machine was suspended. That person can log in, but
the "switch user" button just causes the system to go back to the
screensaver, with the original person logged in. I think that Ctrl-Alt-
Backspace will generally restart X, but that also kills all of the other
logins.
I have a completely up-to-date Intrepid i386 system. Compiz is enabled.
Attaching output of `sudo lspci -vvnn` and the /var/log/Xorg.0.log file
Also of interest may be that when I run: $xprop | grep WM_CLASS
I get: WM_CLASS(STRING) = "Navigator", "Firefox"
Should this be "gnome-session", "Gnome-session" as shown by the original
poster? Maybe this is a clue as to what has gone wrong.
I am also pretty sure this problem disappears if I fully reboot. Seems
to mainly happen after cycling through suspend mode.
Thanks for your help!
** Attachment added: "lspci.-vvnn.010809"
http://launchpadlibrarian.net/21013235/lspci.-vvnn.010809
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Switch user resuilts in "Cannot start new display" error
https://bugs.launchpad.net/bugs/280216
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