[Bug 2079866] Re: grub-pc configure fails during upgrade from 22.04 to 24.04

[Hatto von Hatzfeld]

System upgrading from Ubuntu 22.04.5 LTS to 24.04.2 LTS leaded to the same error.
Now "apt upgrade" returns:

[...]
Entpacken von cloud-init (25.1.4-0ubuntu0~24.04.1) über (25.1.2-0ubuntu0~24.04.1) ...
cloud-init (25.1.4-0ubuntu0~24.04.1) wird eingerichtet ...
linux-libc-dev:amd64 (6.8.0-71.71) wird eingerichtet ...
grub-pc (2.12-1ubuntu7.3) wird eingerichtet ...
i386-pc wird für Ihre Plattform installiert.
mdadm: /dev/md does not appear to be an md device
grub-install: Fehler: RAID_VERSION-Fehler (ioctl): Unpassender IOCTL (I/O-Control) für das Gerät.
dpkg: Fehler beim Bearbeiten des Paketes grub-pc (--configure):
 »installiertes post-installation-Skript des Paketes grub-pc«-Unterprozess gab den Fehlerwert 1 zurück
[...]
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
done
Fehler traten auf beim Bearbeiten von:
 grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)

My hard disk partitions:
sda       8:0    0 232,9G  0 disk  
├─sda1    8:1    0  1000M  0 part  
│ └─md0   9:0    0   999M  0 raid1 /boot
├─sda2    8:2    0     2G  0 part  [SWAP]
└─sda3    8:3    0   230G  0 part  
  └─md1   9:1    0 229,8G  0 raid1 /
sdb       8:16   0 232,9G  0 disk  
├─sdb1    8:17   0  1000M  0 part  
│ └─md0   9:0    0   999M  0 raid1 /boot
├─sdb2    8:18   0     2G  0 part  [SWAP]
└─sdb3    8:19   0   230G  0 part  
  └─md1   9:1    0 229,8G  0 raid1 /

Is there any workaround? Or is it appropriate to ignore the error?

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https://bugs.launchpad.net/bugs/2079866

Title:
  grub-pc configure fails during upgrade from 22.04 to 24.04

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  During upgrade to 24.04 and afterwards when executing "apt upgrade"  I
  get the following error:

  Setting up grub-pc (2.12-1ubuntu7) ...
  Installing for i386-pc platform.
  mdadm: /dev/md does not appear to be an md device
  grub-install: error: ioctl RAID_VERSION error: Inappropriate ioctl for device.
  dpkg: error processing package grub-pc (--configure):
   installed grub-pc package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
   grub-pc
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  The system does function normally, but I can not finish the upgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: grub-pc 2.12-1ubuntu7
  ProcVersionSignature: User Name 6.8.0-41.41-generic 6.8.12
  Uname: Linux 6.8.0-41-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CloudArchitecture: x86_64
  CloudBuildName: server
  CloudID: configdrive
  CloudName: configdrive
  CloudPlatform: configdrive
  CloudSerial: 20221104
  CloudSubPlatform: config-disk (/dev/sda5)
  Date: Fri Sep  6 21:28:09 2024
  ProcEnviron:
   LANG=C.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm
   XDG_RUNTIME_DIR=<set>
  SourcePackage: grub2
  UpgradeStatus: Upgraded to noble on 2024-08-30 (8 days ago)
  mtime.conffile..etc.init.d.apport: 2024-07-22T14:59:07

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