Making adjustments to a non functioning ubuntu install

published Dec 17, 2013 10:55 by admin ( last modified Dec 17, 2013 10:55 )

Boot with a live CD or live USB. Assuming that your install is availableat /dev/sda1, then, quoted from:

http://askubuntu.com/questions/112957/display-works-fine-in-livecd-but-not-in-full-installation

sudo mkdir -p /media/ubuntu
sudo mount /dev/sda1 /media/ubuntu

Then you need to mount the proc, dev, and sys filesystems into your new environment:

sudo mount --bind /dev /media/ubuntu/dev
sudo mount --bind /proc /media/ubuntu/proc
sudo mount --bind /sys /media/ubuntu/sys

Finally, chroot into it:

sudo chroot /media/ubuntu

Now edit /etc/default/grub, uncommenting out the line

GRUB_GFXMODE=640x480

and then run

sudo update-grub