[Bug 1043769] [NEW] Monitor image not clickable in display settings after the first time

[Launchpad Bug Tracker]

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[Impact]

Users with multiple displays are unable to change display settings
(arrange displays, change resolutions, change the primary display, etc.)
with 'gnome-control-center display' unless they happen to know to switch
focus to another window and switch back again between every mouse click.

[Test Case]

 1. Have a multi monitor setup with 2 (or more) monitors
 2. Open the display settings applet in the control center
 3. Click on the monitor that is not currently selected
 4. Try to select the originally selected monitor by clicking on it

[Regression Potential]

The patches in the attached debdiffs are from the upstream git
repositories and are in the latest upstream releases.  Raring has been
using these upstream releases for some time now; any regressions likely
would have showed up in Raring.

That being said, the cairo change is potentially risky, as it alters
some low-level behaviors and many packages depend on cairo.  The changes
to gnome-control-center are limited to the Displays panel; any
regressions should only affect that panel (and that panel is already
severely broken with multiple displays).

[Original Bug Report]

Steps to reproduce:

* Have a multi monitor setup with 2 monitors
* Open the display settings applet in the control center
* Click on the monitor that is not currently selected
* Click on the monitor that was initially selected

Expected result:
* The second click should select again the clicked monitor

Actual result:
* The second click fails to select the clicked monitor, selection remains where it is

If you focus another application and focus back to the display settings
window, then you can move the selection again for one single time, then
the bug appears again until you switch focus again.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gnome-control-center 1:3.4.2-0ubuntu13
ProcVersionSignature: Ubuntu 3.5.0-13.13-generic 3.5.3
Uname: Linux 3.5.0-13-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.5.1-0ubuntu3
Architecture: i386
Date: Thu Aug 30 13:14:48 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to quantal on 2012-08-29 (0 days ago)
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu3
 deja-dup                            23.90-0ubuntu1
 gnome-control-center-signon         0.0.13-0ubuntu1
 indicator-datetime                  12.10.0-0ubuntu1

** Affects: cairo
     Importance: Medium
         Status: Fix Released

** Affects: gnome-control-center
     Importance: High
         Status: Fix Released

** Affects: cairo (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: gnome-control-center (Ubuntu)
     Importance: Low
         Status: Confirmed


** Tags: apport-bug i386 patch quantal running-unity
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Monitor image not clickable in display settings after the first time
https://bugs.launchpad.net/bugs/1043769
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