I am booting ubuntu 12.04 from a usb made with linux live usb creator. It is fine as long as I select the nomodeset option at the purple ubuntu screen.
The question is:
How can I set this mode to be the default one so I don't have to do it every time?
If I add the option to /etc/default/grub
it doesn't do anything and if I
sudo update-grub
I get this error
"/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?)."
how to fix this ?