After upgrade to gnome 3 error video card suppot?!

bas@vaio:~$ gnome-shell
Window manager warning: Failed to load theme "Adwaita": Failed to find a valid file for theme Adwaita

Window manager warning: Screen 0 on display ":0" already has a window manager; try using the --replace option to replace the current window manager.
bas@vaio:~$

bas@vaio:~$ gnome-shell --replace
Window manager warning: Failed to load theme "Adwaita": Failed to find a valid file for theme Adwaita

    JS ERROR: !!! Exception was: Error: Requiring NetworkManager, version none: Typelib file for namespace 'NetworkManager' (any version) not found
    JS ERROR: !!! lineNumber = '0'
    JS ERROR: !!! fileName = 'gjs_throw'
    JS ERROR: !!! stack = '("Requiring NetworkManager, version none: Typelib file for namespace 'NetworkManager' (any version) not found")@gjs_throw:0
@/usr/share/gnome-shell/js/ui/status/network.js:8
'
    JS ERROR: !!! message = 'Requiring NetworkManager, version none: Typelib file for namespace 'NetworkManager' (any version) not found'
      JS LOG: NMApplet is not supported. It is possible that your NetworkManager version is too old
Window manager warning: Log level 16: Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: An authentication agent already exists for the given subject
Window manager warning: Log level 16: Error registering polkit authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: An authentication agent already exists for the given subject (polkit-error-quark 0)
      JS LOG: GNOME Shell started at Sun Jun 05 2011 22:23:09 GMT+0200 (CEST)
^C
bas@vaio:~$

Gnome3 is experimental and not stable, so you will get issues

Ok, can I downgrade? Can I do anything to resolve this issue?

Thanks actionparsnip you help so much people

Regards,
B

gnome-shell seems to work when I type:

gnome-shell --replace

Does anyone know how I can start gnome-shell automatic?
It looks a lot better then the Unity interface.

Help would be very much appreciated.

Regards,
B

I have a related problem. I am unable to log into the Gnome Shell the first time I try. I get the error message that something has gone wrong, forcing me to log out. When I log back in again, thing seem to work just fine. I am using Ubuntu 11.04 Natty Narwhal 64-bit on a Dell XPS 15 L501x laptop. Isolating the error message from ~/.xsession-errors for the failed login session, I found

JS ERROR: !!! Exception was: Error: Requiring NetworkManager, version none: Typelib file for namespace 'NetworkManager' (any version) not found
    JS ERROR: !!! lineNumber = '0'
    JS ERROR: !!! fileName = 'gjs_throw'
    JS ERROR: !!! stack = '("Requiring NetworkManager, version none: Typelib file for namespace 'NetworkManager' (any version) not found")@gjs_throw:0
@/usr/share/gnome-shell/js/ui/status/network.js:8
'
    JS ERROR: !!! message = 'Requiring NetworkManager, version none: Typelib file for namespace 'NetworkManager' (any version) not found'
      JS LOG: NMApplet is not supported. It is possible that your NetworkManager version is too old

I should point out that I use wicd and not network-manager for connecting to my preferred wireless network. In fact, I removed network manager altogether, before setting up wicd. I stopped using network-manager because it would lose all my static DNS settings, and I'd have to manually edit /etc/resolv.conf (as root) to get the static DNS to work. Wicd seemed to have better support for static DNS, but it looks like network-manager's absence has broken Gnome Shell somehow.

This worked for me:

http://www.ajopaul.com/2011/04/26/ubuntu-11-04-uninstall-gnome3-and-revert-to-gnome-2-x/

Well, I hope you are able to find a solution while still keeping Gnome3 :-)