[Bug 1783593] Update Released

[Steve Langasek]

The verification of the Stable Release Update for ubuntu-release-
upgrader has completed successfully and the package has now been
released to -updates.  Subsequently, the Ubuntu Stable Release Updates
Team is being unsubscribed and will not receive messages about this bug
report.  In the event that you encounter a regression using the package
from -updates please report a new bug using ubuntu-bug and tag the bug
report regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1783593

Title:
  UI frozen and no information when the upgrader is installing snap
  packages

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Bionic:
  Fix Released

Bug description:
  Test Case
  1. Upgrade from Xenial to Bionic with update-manager -d

  Result
  At some point, after the deb packages have been upgraded, the UI freezes completely (cf Screenshot) for several minutes (6 minutes on my test system from a default xenial installation without any snap installed) seemingly doing nothing while the upgrader is installing snap packages.

  It should at least inform the user that snap packages are being
  installed, ideally with the currently running action like for debs.

  Additionally, if the machine being upgraded loses network connectivity
  at this stage, it hangs there forever and the only way out is to
  manually abort the ongoing snap change.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: ubuntu-release-upgrader-core 1:18.10.5
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  Uname: Linux 4.15.0-23-generic x86_64
  ApportVersion: 2.20.10-0ubuntu7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jul 25 17:13:13 2018
  InstallationDate: Installed on 2014-07-15 (1471 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to cosmic on 2018-03-24 (123 days ago)

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