Andy said:

> Did the upgrade to the 2.12-1ubuntu7.1 version of grub-pc in the evening of
> the 14th Jan. I don't remember a problem then, or since.

If your upgrades of grub-pc worked and apt update then full-upgrade
still works now then you don't need to do anything. Though I am confused
as to how you have avoided being affected by this.

What does:

$ sudo gdisk -l /dev/xvda

say for you, out of interest?

# gdisk -l /dev/xvda

GPT fdisk (gdisk) version 1.0.10

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Disk /dev/xvda: 52428800 sectors, 25.0 GiB

Sector size (logical/physical): 512/512 bytes

Disk identifier (GUID): 1632EDC1-5D6E-4B1A-9DF5-D1C3D193B0F3

Partition table holds up to 128 entries

Main partition table begins at sector 2 and ends at sector 33

First usable sector is 34, last usable sector is 52428766

Partitions will be aligned on 2048-sector boundaries

Total free space is 2014 sectors (1007.0 KiB)

Number Start (sector) End (sector) Size Code Name

1 227328 52428766 24.9 GiB 8300

14 2048 10239 4.0 MiB EF02

15 10240 227327 106.0 MiB EF00

You are making me doubt my memory of what happened two and a half weeks ago - was there a complaint when it happened?? - but it's worked since and I can update and reboot fine.

Ian