[Bug 1961626] [NEW] grub rescue after installing alongside

[Ross Gammon]

Public bug reported:

Existing Ubuntu Studio installation (21.10) is on sda.
Plugged in external USB disk (500G) - sdc. Wiped partition on it with gparted.
Booted into 20.04.4 Ubuntu Studio Live DVD & chose install. Chose to install alongside 21.10, and it correctly installed to sdc.
On reboot, I got the grub rescue prompt.
I had to boot back into the Live DVD, chroot into sda, reinstall grub, and upgrade grub.
After a reboot, I can now boot both installations.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1961626

Title:
  grub rescue after installing alongside

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Existing Ubuntu Studio installation (21.10) is on sda.
  Plugged in external USB disk (500G) - sdc. Wiped partition on it with gparted.
  Booted into 20.04.4 Ubuntu Studio Live DVD & chose install. Chose to install alongside 21.10, and it correctly installed to sdc.
  On reboot, I got the grub rescue prompt.
  I had to boot back into the Live DVD, chroot into sda, reinstall grub, and upgrade grub.
  After a reboot, I can now boot both installations.

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