[Bug 1246364] Re: update-notifier does not show a tray icon in xubuntu

[Forest]

Here's a patch against the version of update-notifier in current utopic
snapshots. The patched version preserves the new (broken) behavior by
default, but restores the ability to disable auto-launch using this
command line:

gsettings set com.ubuntu.update-notifier auto-launch false

Once that setting is in place, restarting update-manager will restore the old behavior.
(If someone wants to expand on this patch and add a GUI check box for this setting, please do.)

Note: There is a related bug that can prevent the update-notifier icon
from showing up on non-Unity desktops. Libappindicator is supposed to
fall back to good old systray icons in that case, but it doesn't always.
If your system exhibits the bug, try installing an Indicator plugin on
your desktop's panel, if one is available. Xfce users can get one from
the xfce4-indicator-plugin package, which I believe is installed by
default in new utopic installations. Here's the bug report:

https://bugs.launchpad.net/libappindicator/+bug/1086656

** Patch added: "restore_tray_icon.patch"
   https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1246364/+attachment/4207080/+files/restore_tray_icon.patch

** Patch removed: "restore_tray_icon.patch"
   https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1246364/+attachment/3945176/+files/restore_tray_icon.patch

** Tags added: utopic

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https://bugs.launchpad.net/bugs/1246364

Title:
  update-notifier does not show a tray icon in xubuntu

Status in One Hundred Papercuts:
  Confirmed
Status in The Update Notifier:
  New
Status in “update-notifier” package in Ubuntu:
  Confirmed

Bug description:
  update-notifier does not show a tray icon/notification in xubuntu 13.10 anymore. Instead the software updater window appears minimized, when updates are available.
  Additionally I tried to trigger the 'System Restart Required'-notification manually by adapting /var/run/reboot-required, but no notification was displayed (although it shows up in motd).
  As a side note: I got a 'there is something wrong with updates'-notification by removing update-notifier-common while update-notifier was running.

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