Public bug reported:
While updating a server from 22.04 to 24.04, I received the following
error.
2026-06-11 09:35:03,829 ERROR Exception during pm.DoInstall()
Traceback (most recent call last):
File
"/root/tmp/ubuntu-release-upgrader-b7_j9bfp/DistUpgrade/DistUpgradeView.py",
line 220, in run
res = pm.do_install(self.writefd)
apt_pkg.Error: E:Sub-process /usr/bin/dpkg returned an error code (1)
2026-06-11 09:35:03,835 ERROR got a error from dpkg for pkg: 'grub-pc':
'installed grub-pc package post-installation script subprocess returned error
exit status 1'
2026-06-11 09:35:03,835 ERROR got a error from dpkg for pkg:
'grub-gfxpayload-lists': 'dependency problems - leaving unconfigured'
2026-06-11 09:35:03,937 ERROR SystemError from cache.commit():
installArchives() failed
2026-06-11 09:35:03,937 ERROR found exception: 'E:Sub-process /usr/bin/dpkg
returned an error code (1)'
2026-06-11 09:35:03,937 DEBUG RELEASE_UPRADER_NO_APPORT env set
2026-06-11 09:35:03,937 ERROR Could not install the upgrades The upgrade has
aborted. Your system could be in an unusable state. A recovery will run now
(dpkg --configure -a).
Please report this bug in a browser at
http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug and
attach the files in /var/log/dist-upgrade/ to the bug report.
E:Sub-process /usr/bin/dpkg returned an error code (1) (None)
2026-06-11 09:35:04,471 DEBUG Running PostInstallScript:
'./xorg_fix_proprietary.py'
2026-06-11 09:35:04,519 DEBUG Running PostInstallScript:
'/usr/lib/ubuntu-advantage/convert_list_to_deb822.py'
2026-06-11 09:35:04,691 DEBUG Running PostInstallScript:
'/usr/lib/ubuntu-advantage/upgrade_lts_contract.py'
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2156474
Title:
dist-upgrade error
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