Group checkbox behaviour seems incorrect

[Dario Ruellan]

Checking/unchecking the group checkbox seems to flip the value of its child checkboxes instead of mark all/mark none.

Test case:
Ask for updates, make sure the packages are grouped by source.
Uncheck the first child of a group.
Click on the global checkbox of the same group.

What I get:
The first child is set to "checked", the rest are set "unchecked", like a binary NOT operation.

What I expect:
Child checkboxes should mimic the group checkbox status.
If the grup checkbox is set to "unchecked", all childs must be unchecked.
If the group checkbox is set to "checked", all childs must be checked.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.11
ProcVersionSignature: Ubuntu 3.2.0-33.52-generic-pae 3.2.31
Uname: Linux 3.2.0-33-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu15
Architecture: i386
CheckboxSubmission: 1c569236429244c2837ef2720aaa3765
CheckboxSystem: b845c366ea09c60efa3a45c1b5b21525
Date: Sat Nov 17 19:12:50 2012
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1353190182
 com.ubuntu.update-manager show-details true
 com.ubuntu.update-manager window-height 876
 com.ubuntu.update-manager window-width 1535
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Robert Roth (evfool)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug #1039543, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Dario Ruellan (druellan)]

Thanks Robert. I can see it is already triaged and assigned to a dev, so, I'm going to remove it from the Papercuts project; there is no point on wasting resources for something already in course.