Could you describe what's happening when the GDM error messages show up? Is it after the loading screen, before/after login, etc? What does the screen look like (has X started)?
It would also be helpful to know your hardware. If you can get into Jaunty (via Live CD), then run in a terminal and post the output here.
If you have access to an ethernet connection then you can try to upgrade from the terminal.
1) Install Jaunty and run all the updates that are available, but don't upgrade to a newer version.
2) Reboot and don't log in (or logout if you have auto-login enabled).
3) Ctrl+Alt+F2 to switch to a virtual console and log in.
4) Upgrade to Karmic
Code:
sudo apt-get update && sudo apt-get dist-upgrade
5) Once the upgrade finishes, then
Bookmarks