[Bug 1972255] Re: do-release-upgrade fails to upgrade 20.04 -> 22.04 when run from chroot

[Mateusz Korniak]

*** This bug is a duplicate of bug 1965568 ***
    https://bugs.launchpad.net/bugs/1965568

> You could check /var/log/dist-upgrade/main.log and see if you have the
same error message

I do not have /var/log/dist-upgrade/main.log for failing run now. :(
Trying next time, I will save /var/log/dist-upgrade/main.log in case of error and open new bug report.

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https://bugs.launchpad.net/bugs/1972255

Title:
  do-release-upgrade fails to upgrade 20.04 -> 22.04 when run from
  chroot

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  When running do-release-upgrade in 20.04 chroot it fails without any
  error/reason returning back to shell:

  # do-release-upgrade -d
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [819 B]                                                                                                                                                                                                                                          
  Get:2 Upgrade tool [1261 kB]                                                                                                                                                                                                                                                  
  Fetched 1262 kB in 0s (0 B/s)                                                                                                                                                                                                                                                 
  authenticate 'jammy.tar.gz' against 'jammy.tar.gz.gpg' 
  extracting 'jammy.tar.gz'
  [screen is terminating]

  
  # lsb_release -rd
  Description:    Ubuntu 20.04.4 LTS
  Release:        20.04

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