[Bug 1901482] Re: E: Can not write log (Is /dev/pts mounted?) - posix_openpt (19: No such device)

[Iusico Maxim]

Same problem on Ubuntu Server (21.10). Got an infinite loop after installation
completed and updates started installing.

As workaround I simply switched to tt2 (Ctrl+Alt+F2) and forced to reboot:
$ systemctl reboot -i

Then, manually upgrade once logged in:
$ sudo apt upgrade

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https://bugs.launchpad.net/bugs/1901482

Title:
  E: Can not write log (Is /dev/pts mounted?) - posix_openpt (19: No
  such device)

Status in subiquity package in Ubuntu:
  Confirmed

Bug description:
  20.04.1, when applying updates, 'full log' is reporting for every
  package install:

  E: Can not write log (Is /dev/pts mounted?) - posix_openpt (19: No
  such device)

  This should either be corrected (by mounting devpts into the /target/
  or redirecting the error to /dev/null to avoid causing the
  administrator wasting time trying to determine if there's a fault with
  the installation.

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