als je x niet meer werkt dit ff probren
1. Login via fail safe option as it does not flicker and start a cli - in my case I could choose either start the root option or start normal mode options in the failsafe menu - in both cases i had a cli where I could give commands below.
2. Backup your old etc/X11/xorg.conf
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup_2009_11_05
3. Generate real values to your xorg.conf, ie. completely filled out xorg.conf
sudo Xorg -configure
4. Copy the generated new xorg.conf to right location
sudo cp /home/MY-USER/xorg.conf.new /etx/X11/xorg.conf
5. Stop gdm if the process is running (I'm not sure if this was a must but in my case GDM GUI came up/system started after stopping gdm step as I was in the normal mode cli)
sudo stop gdm
6. Start system either through reboot or through going from fail safe menu to normal boot directly.
Gevonden in een ander draadje:
http://forum.ubuntu-nl.org/software-en-configuratie/ubuntu-9-10-boot-in-een-soort-terminalvenster/