Comment 4 for bug 1814364

I missed affects, perhaps grub-pc( or grub).

I have 4 desktop pc, and 1 is UEFI bios.
I use UEFI bios to legacy mode.
other 3 PCs not support UEFI.

UEFI bios PC do not occurd to display select install grub device,
and finished update. but #675171 problem occurd.
My disk(/dev/sda) have 4 partions for 4 ubuntu.
I update to use software updater ubuntu in /dev/sda4,
grub update /dev/sda1 pbr.
so I want to boot ubuntu in /dev/sda1,
but boot up ubuntu in /dev/sda4.
/dev/sda2, /dev/sda3, /dev/sda4 are work fine,
only /dev/sda4 updated to affect /dev/sda1.

I repaired /dev/sda1 pbr to use grub-install command,
but I want to update this problem.