Hi,
I am running LTSP server in Ubuntu Hardy Heron. For a long time this worked perfectly but I can no longer boot into the GUI after logging in at the Ubuntu screen on the thin client. All that happens is that I get a blank screen with a mouse pointer. I get the following error in the client username's .xsession-errors file:

SESSION_MANAGER=local/mark-desktop:/tmp/.ICE-unix/8216
** Message: another SSH agent is running at: /tmp/ssh-xCJGdO8187/agent.8187
x-session-manager: Fatal IO error 2 (No such file or directory) on X server localhost:12.0.
gnome-settings-daemon: Fatal IO error 0 (Success) on X server localhost:12.0.
Xsession: X session started for test at Thu Nov 27 13:23:11 GMT 2008
Setting IM through im-switch for locale=en_US.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.

I would appreciate any help on understanding the error and trying to fix it. Thanks