[Bug 1776622] Re: snapd on cosmic never finishes installing/updating. Can't install any other updates.

[Michael Vogt]

Hey Alex first, sorry for the trouble you have! We do run ~2800 tests
which each branch merged or release. This includes an automatic upgrade
test. Unfortunately the hang is not reproducible for everyone it seems,
neither our automatic tests nor I in a VM have managed to trigger this
hang. But we are very keen to learn what is missing to reproduce this
issue. Is there anything special on the systems you experience this
issue (unusual polkit configuration or special integration with pam or
similar).

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Title:
  snapd on cosmic never finishes installing/updating. Can't install any
  other updates.

Status in snapd:
  Confirmed
Status in snapd package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  snapd (2.33+18.10ubuntu3) cosmic never finishes installing. Can't
  install any other updates.

  The first time I gave up waiting and killed it. Then...

  $ sudo apt full-upgrade
  E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.

  $ sudo dpkg --configure -a
  Setting up snapd (2.33+18.10ubuntu3) ...
  snapd.snap-repair.service is a disabled or a static unit, not starting it.

  << never ends >>

  All the while the snap and snapd process use about 0.3% CPU (which is
  more than usual).

  WORKAROUND:

  sudo killall apt dpkg
  sudo dpkg -r snapd gnome-software-plugin-snap
  sudo apt update
  sudo apt full-upgrade

  ---

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: snapd 2.33+18.10ubuntu3
  ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
  Uname: Linux 4.15.0-22-generic x86_64
  ApportVersion: 2.20.10-0ubuntu3
  Architecture: amd64
  Date: Wed Jun 13 16:49:20 2018
  InstallationDate: Installed on 2018-05-26 (17 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180525)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  SourcePackage: snapd
  UpgradeStatus: No upgrade log present (probably fresh install)

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