update-manager can't be brought to the front by clicking in the launcher

[Mark Longair]

Periodically, when there are new updates available, the update-manager icon appears in the Unity launcher on the left hand side of my screen. It has the blue "attention requested" triangle on the left, and a number in the top right, presumably indicating the number of packages with updates. However, clicking on this icon does nothing, whereas I would expect the update-manager to be brought to the front so that I can install the updates.

As a workaround, I have to do: "killall update-manger; sudo update-manager" which brings up the update-manager window fine, and lets me install the updates.

I don't think that I've seen this problem with any other applications, hence reporting it against update-manager rather than unity.

Thanks in advance for looking into this.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.9
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24
Uname: Linux 3.2.0-29-generic-pae i686
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu12
Aptdaemon:

Architecture: i386
Date: Fri Aug 31 10:34:57 2012
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1346395789
 com.ubuntu.update-manager show-details true
 com.ubuntu.update-manager window-height 604
 com.ubuntu.update-manager window-width 519
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to precise on 2012-04-29 (124 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mark Longair (mark-ubuntu)]

As an update to my bug report, this problem hasn't occurred on the last two occasions that the update-manager has appeared in the dock, so I assume that some update has fixed this.

[Mark Longair (mark-ubuntu)]

I spoke too soon - today this bug happened again. It doesn't matter which workspace I switch to, clicking on the update-manager icon in the dock has no effect.