[Bug 1305294] Re: QT uses incorrect theme when GNOME_DESKTOP_SESSION_ID is unset

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu/trusty/upstart

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https://bugs.launchpad.net/bugs/1305294

Title:
  QT uses incorrect theme when GNOME_DESKTOP_SESSION_ID is unset

Status in “upstart” package in Ubuntu:
  Confirmed
Status in “upstart” source package in Trusty:
  In Progress

Bug description:
  Bug discovered when launching VLC from the sound indicator applet: the
  QT UI theme is wrong. The theme is correct when launched from Unity
  launcher or terminal. Please see the attached screenshots.

  I've tracked it down to a difference in environment in the VLC
  process: When launched from indicator-sound, the variable
  GNOME_DESKTOP_SESSION_ID is unset, and this causes VLC to become
  themed incorrectly. (If the variable is given any value, then VLC
  looks correct.)

  To reproduce, either:
  1) Launch VLC from indicator-sound (make sure it's not already running and has been started from somewhere else)
  2) Or just start VLC like this from terminal:
  $ GNOME_DESKTOP_SESSION_ID= vlc

  Looks like a bug in qt4, which seems to depend on
  GNOME_DESKTOP_SESSION_ID being set [to anything] to pick up the
  correct theme. (The variable is deprecated, according to its default
  value in Ubuntu 14.04.)

  Try:
  $ GNOME_DESKTOP_SESSION_ID= qtconfig

  Observe theme not picked up from "Desktop settings" in qtconfig.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: qt4-qtconfig 4:4.8.5+git192-g085f851+dfsg-2ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Apr  9 22:15:27 2014
  InstallationDate: Installed on 2014-04-01 (8 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  SourcePackage: qt4-x11
  UpgradeStatus: No upgrade log present (probably fresh install)

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