I just did the upgrade from 12.04 --> 12.10 --> 13.04 and got this issue.
I fixed it by the suggestion here, to run grub-install. For my system, I did:
> df
I found that my root partition was on sda1 - and as I only have one HDD, I know it's sda now.
> sudo grub-install /dev/sda > sudo update-grub > sudo reboot
More info on installing/reinstalling grub: https://help.ubuntu.com/community/Grub2/Installing
I just did the upgrade from 12.04 --> 12.10 --> 13.04 and got this issue.
I fixed it by the suggestion here, to run grub-install.
For my system, I did:
> df
I found that my root partition was on sda1 - and as I only have one HDD, I know it's sda now.
> sudo grub-install /dev/sda
> sudo update-grub
> sudo reboot
More info on installing/ reinstalling grub: https:/ /help.ubuntu. com/community/ Grub2/Installin g