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Written by Oleksandr Gavenko (AKA gavenkoa), compiled at 2015-10-05 from rev 764bb173578d.

GRUB.¶

Contents

GRUB.
- Resore GRUB 2.
- Setting text mode resolution on boot.

Resore GRUB 2.¶

If you boot to same bit-width kernel (32/64) that have installed you can chroot to main system and recover by your Linux discto commans:

mount /dev/sdX /mnt
sudo mount --bind /dev /mnt/dev &&
sudo mount --bind /dev/pts /mnt/dev/pts &&
sudo mount --bind /proc /mnt/proc &&
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt
grub-install /dev/sdX
update-grub

Check that partition with /boot directory:

$ mount /dev/sdX /mnt
$ ls -l /mnt/boot/grub

Setting text mode resolution on boot.¶

vga=mode

Specifies the VGA text mode that should be selected when booting. mode defaults to the VGA mode setting in the kernel image. The values are not case-sensitive. They are:

ask

Prompts the user for the text mode. Pressing Enter in response to the prompt displays a list of the available modes. extended (or ext) Selects 80x50 text mode.

normal

Selects normal 80x25 text mode.

number

Uses the text mode that corresponds to number. A list of available modes for your video card can be obtained by booting with vga=ask and pressing Enter.