[Bug 2130417] Re: 25.10 do-release-upgrade leaves system unusable after grub file comparision

[Bogdan Enache]

** Package changed: ubuntu => dpkg (Ubuntu)

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Title:
  25.10 do-release-upgrade leaves system unusable after grub file
  comparision

Status in dpkg package in Ubuntu:
  New

Bug description:
  Trying to upgrade from Kubuntu 25.04 to Kubuntu 25.10, arriving at upgrading grub (using the console in KDE to run do-release-upgrade).
  I got a message if I want to keep the locally installed version or the new version a file related to grub (don't remember which).
  I chose the option to compare the files, and then nothing happened. Normally I should get a screen showing the differences, but this didn't happen.
  There was no way to recover from this error.
  I had to kill do-release-upgrade.
  I ran dpkg --configure -a to recover, but this one got stuck on update-initramfs, which was unrecoverable and unfixable no matter what I did (apt install -f) etc.
  After reboot, the system would not boot anymore, with a kernel panic showing that init is missing.
  I had to reinstall the system from scratch, so log files are not available.

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