NVidia driver failure on new system

[Thomas Milne]

My 'new' system has a GForce GT520. I installed Debian Squeeze, installed
nvidia-dkms, and upgraded to unstable. As soon as I enable the nvidia
driver, though, the system become totally unresponsive. All I get is a
rapidly flashing cursor and a flashing numlock. If I reboot I can get into
recovery mode and switch back to the generic driver, but that only gives me
800x600.

I found this in xsession-errors:

/etc/gdm3/Xsession: Beginning session setup...
GNOME_KEYRING_CONTROL=/tmp/keyring-pmldst
GNOME_KEYRING_CONTROL=/tmp/keyring-pmldst
GNOME_KEYRING_CONTROL=/tmp/keyring-pmldst
SSH_AUTH_SOCK=/tmp/keyring-pmldst/ssh
librdf warning - Model does not support contexts
librdf warning - Model does not support contexts
librdf warning - Model does not support contexts
Window manager warning: Failed to read saved session file
/home/joehill/.config/metacity/sessions/
107e382d5a521abc3113070141156434900000021170023.ms: Failed t$
** Message: applet now removed from the notification area
** Message: applet now embedded in the notification area
Initializing nautilus-gdu extension

(gnome-power-manager:2179): GLib-GObject-CRITICAL **: g_object_unref:
assertion `G_IS_OBJECT (object)' failed
** Message: applet now removed from the notification area
Shutting down nautilus-gdu extension
** Message: Got disconnected from the session message bus; retrying to
reconnect every 10 seconds
gnome-settings-daemon: Fatal IO error 11 (Resource temporarily unavailable)
on X server :0.
** Message: <info>  disconnected by the session bus.

polkit-gnome-authentication-agent-1: Fatal IO error 11 (Resource temporarily
unavailable) on X server :0.
kerneloops-applet: Fatal IO error 11 (Resource temporarily unavailable) on X
server :0.
update-notifier: Fatal IO error 11 (Resource temporarily unavailable) on X
server :0.
gdu-notification-daemon: Fatal IO error 11 (Resource temporarily
unavailable) on X server :0.
gnome-screensaver: Fatal IO error 11 (Resource temporarily unavailable) on X
server :0.
nm-applet: Fatal IO error 11 (Resource temporarily unavailable) on X server
:0.
system-config-printer-applet: Fatal IO error 11 (Resource temporarily
unavailable) on X server :0.
The application 'gnome-panel' lost its connection to the display :0;
most likely the X server was shut down or you killed/destroyed
the application.

but it looks like all that is just to do with missing panel and applets and
so on.

Where else can I look for clues?

-- 
Thomas Milne
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