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On a fresh Gutsy install after 1 restart, gdm hangs after a completed 
(successful) login. The login will be performed, the login screen will 
disappear and the brownish gradient default desktop will show up. The login 
sound will be played, but no panels, desktop, or anything else will be loaded. 
It is possible to open a console terminal on all virtual terminals 1 - 6.
This problem does not show itself until the system has been up once normally 
and then restarted.
The problem shows itself even after purging xserver-xorg, gdm, and related 
packages, and even with another fresh install.
It also shows up regardless of whether compiz is enabled or the nvidia 
restricted drivers are in use. I have also tried installing the nvidia binary 
driver directly from the nvidia website, but this did not help anything.
The only thing that has seemed to work so far is dpkg-reconfigure'ing 
xserver-xorg, which allowed it to be opened once before going back to the 
problem. I used mostly defaults in the installation (only setting my 
resolutions and refresh rate). This does not work a second time around. The 
first time (when it did allow it to work once more), I was greeted with a 
messagebox notifying me that keyboard settings between gnome and xserver were 
inconsistent (pc105 vs. pc104, respectively), and asking if I would like to 
keep gnome settings. I chose to keep gnome settings over Xorg's settings. I 
have a slight thought that it may be the dialog woke it up from its slumber, 
and the reason it (reconfiguring) did not help further times was because gnome 
had already decided to keep its own settings and didn't prompt again.
Restarting into a recovery console and manually starting GDM (/etc/init.d/gdm 
start) works perfectly, including with compiz and binary nvidia drivers both 
from apt and the nvidia website.
Going to a console while GDM is frozen and attempting to run "sudo" results in 
the terminal freezing with no way of killing the command (including CTRL-C or 
killing it from another terminal). Running su and entering the root password (I 
have set it manually) works, however, and I can simply kill off the other 
terminal by killing the shell. Possibly gnome has frozen the authentication 
server? (I do not know much about this or how it works).
dmesg and the X log contain nothing of note (no difference between a working 
and non-working session).
Also, I've removed the fast user switching gnome plugin, which makes no 
difference (the panel plugin, at least).
Final note: Running uptime/top in one of the consoles while gnome is hung 
reveals a constantly growing load (up from around 1.7 initial, to up to about 
12 when checked once. It does not jump or spike, it simply gradually goes up 
and settles).

It seems to be possibly related to a bug posted in a comment under bug #113067 
by Rob Hughes
https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/113067

Let me know if I need to clarify / add anything.

General Specs:
AMD Athlon X2 3800+ (@2.5GHz, but stable)
1GB RAM
A939 Motherboard (nForce4 chipset)
GeForce 6600PX video
2.6.22-14 Kernel (Generic)

CJ

** Affects: gdm (Ubuntu)
     Importance: Undecided
         Status: New

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gdm hangs after login in gutsy
https://bugs.edge.launchpad.net/bugs/157622
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Bugs, which is a bug contact for gdm in ubuntu.

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