Public bug reported:
On two occasions in the last few months I have had to re-install grub after a
software update. I think that my disk partitioning is the problem. Here the
print from fdisk:
Disk /dev/sda: 298.1 GiB, 320072933376 bytes, 625142448 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x0f8002b1
Device Boot Start End Sectors Size Id Type
/dev/sda1 2046 14667775 14665730 7G 5 Extended
/dev/sda2 14667776 48222207 33554432 16G b W95 FAT32
/dev/sda3 * 48222208 625141759 576919552 275.1G 83 Linux
/dev/sda5 2048 14667775 14665728 7G 83 Linux
Partition 1 does not start on physical sector boundary.
Partition table entries are not in disk order.
The system is in /dev/sda3, sda1 contains lubuntu and there is no
operating system in sda2. sda5 has only recently appeared and its
existence is a complete mystery. I got grub back by doing a re-install
of lubuntu in /dev/sda1.
I am using ubuntu18.04.5 -- and I apply all software updates. (The user
interface on 10.04LTS was better)
It is impossible to get any more diagnostics because my machine just
offers a blank screen with a blinking cursor in the top LH upon switch
on.
** Affects: grub (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1900838
Title:
grub corrupted by routine system update -- maybe due to unconventional
partitioning
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