I installed Ubuntu 12/04 64 bit on my desktop using the Nomodeset on boot screen. After the CD finished installing it asked me to restart, I hit restart button, my CD pops out so I take it out and close the DVD drive. When my computer restarted on boot screen it got all purple and warped looking and just sits there like that. Please help, I think it's my gfx card but I don't know what to do to fix this.
You should try adding nomodeset to the default boot again. After the BIOS screen finishes on your computer press
Esc quickly and then scroll to the kernel you want to boot. Add
nomodeset to the end of the line which starts with "linux" and then boot.
If that works you'll want to make it permanent in which case you have to edit the default grub file:
sudo gedit /etc/default/grub
nomodeset to end of the line which starts with
GRUB_CMDLINE_LINUX_DEFAULT then type
sudo update-grub and reboot.