How to restore the MBR after do-release-upgrade?

Liam Proven lproven at
Sat Jul 9 15:51:00 UTC 2016

On 9 July 2016 at 17:03, Ralf Mardorf <silver.bullet at> wrote:
> So there will be a pointer within the 512 bytes of the MBR, but no
> entry beyond those 512 bytes, the GRUB image that might need additional
> bytes, is written to some space, that belongs to the partition? It's
> somewhere on the disk, but definitively not attached to the 512 bytes
> of the MBR?

I am not sure that I understand.

After this, you will need some other boot manager in your MBR,
something that can chainload the copy of GRUB in your Ubuntu root
partition. This setup alone will not be able to boot your computer.

It is a way of confining Ubuntu's GRUB within Ubuntu. You will need
some other bootloader, such as the FreeBSD one perhaps, or the Windows
one if you use Windows.

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