[Bug 848915] Re: Partial upgrade results in cryptic traceback because $DISPLAY is not set

[Colin Watson]

My observations so far:

 * Even with a hacked-up update-manager that always enters partial upgrade mode, I can't currently reproduce this bug, either directly or via update-notifier.
 * I think partial upgrade mode is a red herring anyway.  Of this bug and its 16 duplicates, only two show "--dist-upgrade" in PythonArgs.  Two have "--no-focus-on-map" (indicating a launch by update-notifier).  Two have no arguments at all, and the others have "-d", suggesting launch from a menu/dash/launcher/terminal/whatever.
 * Only one of these bugs is from the final oneiric version of update-manager or newer, and there appears to be no bug pattern that might have prevented further reports.
 * All but three of these bugs are from systems recently upgraded from natty to oneiric, and two of the remainder from oneiric beta to oneiric.
 * Of the eight bugs with full update-manager logs attached, all eight have unity and unity-2d installed (though I can't really tell what desktop environment they're actually running), and seven have ubuntu-desktop installed.  One has kde-window-manager installed, although not kubuntu-desktop.  One has edubuntu-desktop installed.
 * I'm trying a natty install to see if I can reproduce this on upgrade from that.

My feeling so far is that this was probably a bug in some bit of desktop
infrastructure which has since been fixed, and I expect to remove the
rls-p-tracking tag if further reproduction attempts fail, due to the
paucity of recent reports.

** Changed in: update-manager (Ubuntu Precise)
     Assignee: Barry Warsaw (barry) => Colin Watson (cjwatson)

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https://bugs.launchpad.net/bugs/848915

Title:
  Partial upgrade results in cryptic traceback because $DISPLAY is not
  set

Status in Release Notes for Ubuntu:
  Fix Released
Status in “update-manager” package in Ubuntu:
  Triaged
Status in “update-manager” source package in Oneiric:
  Triaged
Status in “update-manager” source package in Precise:
  Triaged

Bug description:
  win7 wubi 11.04 w/update to o.o. 11.10 Beta 1 crash at start-up

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: update-manager 1:0.152.17
  ProcVersionSignature: Ubuntu 2.6.38-11.49-generic 2.6.38.8
  Uname: Linux 2.6.38-11-generic x86_64
  ApportVersion: 1.22.1-0ubuntu2
  Architecture: amd64
  Date: Mon Sep 12 23:26:51 2011
  ExecutablePath: /usr/bin/update-manager
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/update-manager -d
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/update-manager', '-d']
  SourcePackage: update-manager
  Title: update-manager crashed with RuntimeError in /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py: Gtk couldn't be initialized
  UpgradeStatus: Upgraded to oneiric on 2011-09-12 (1 days ago)
  UserGroups:

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