Wednesday, January 4, 2012

GRUB2 hangs on "Welcome to GRUB!"

GRUB2 hangs on "Welcome to GRUB!"

Today i played with debian "squeeze", that is currently under test and is the next Debian release. I encountered some problems while installing GRUB2 using the Debian Installer from a USB pen, infact i had to switch to a kubuntu live edition in order to install grub2 manually to enable the boot procedure without the live media (that in my case was again a USB pen).
Unfortunately on system reboot i found GRUB2 hang on the "Welcome to GRUB!" message. After some research on Google i came with this BUG:
The problem is in the GRUB graphical console, so it was sufficient to:
  1. boot the system again through the live distribution
  2. mount the linux partition (e.g. /dev/sda5)
    mkdir /mnt/sda5
    mount /dev/sda5 /mnt/sda5
  3. mount --bind /dev, /sys and /proc so that you will retain them after the chroot
    mount --bind /dev /mnt/sda5/dev
    mount --bind /sys /mnt/sda5/sys
    mount --bind /proc /mnt/sda5/proc 
  4. do the chroot
    chroot /mnt/sda5
  5. modify the configuration of GRUB2 (/etc/deafult/grub)  to uncomment GRUB_TERMINAL=console
  6. update the GRUB configuration (update-grub)
  7. reboot the system
Booting GRUB from text console solved the problem, and now the system is correctly working.
Here you can found a guide to configure/install GRUB from a live distribution, in case you need it: (Recover GRUB2 via Live CD paragraph)

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