NOTE 1: If you have Ubuntu Quantal (12.10) or earlier, omit step 4 (the recovery mode menu items are displayed on the top-level menu). (This must be done following step 8 so that /etc/mtab is writable.) Alternatively, you could try selecting ' Enable networking' in step 7, though this has been found to cause the system to hang (see ). If you have /home, /boot, /tmp, or any other mount point on a separate partition, you can mount them with the command mount -all To mount it read/write, enter the command mount -o remount,rw / Press Return with this option highlighted. One of the options (you may need to scroll down to the bottom of the list) will be ' Drop to root shell prompt'. Press Return and your machine will begin the boot process.Īfter a few moments, your workstation should display a menu with a number of options.Select the line ending with ' (recovery mode)', probably the second line, something like: Ubuntu GNU/Linux, with Linux 3.8.0-26-generic (recovery mode) Select the line which starts with ' Advanced options'. (If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.) With UEFI press (perhaps several times) the Escape key to get grub menu. With BIOS, quickly press and hold the Shift key, which will bring up the GNU GRUB menu.(During this time you will probably see a logo of your computer manufacturer.) Note: UEFI fast boot may be too fast to give time to press any key. Wait until the UEFI/BIOS has finished loading, or has almost finished.If booting into recovery mode does not work you can still use your installation CD (if it is a live cd) as described in LivecdRecovery. You are then logged in as root (the superuser) and can repair your system using command line tools. This mode just loads some basic services and drops you into command line mode.

If your system fails to boot for whatever reason, it may be useful to boot it into recovery mode.

Reinstall nvidia drivers