Ubuntu 12.04 Unity window preview with alt+tilde initially shows incorrect window preview

[adam mclean]

Ubuntu:
Description: Ubuntu 12.04.1 LTS
Release: 12.04

Compiz:
  Installed: 1:0.9.7.8-0ubuntu1.4
  Candidate: 1:0.9.7.8-0ubuntu1.4
  Version table:
 *** 1:0.9.7.8-0ubuntu1.4 0
        500 http://ca.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:0.9.7.6-0ubuntu1 0
        500 http://ca.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

Bug description:

alt+tilde is used to switch between windows within an application. When pressed, a preview of all windows from an application show up in the switcher and subsequent "alt+tilde" presses cycle through the window previews allowing you to select the one you want to switch to.

The problem occurs only when alt+tilde is first pressed. The highlighted window preview should be of the window that was active when alt+tilde was pressed because when the alt key is released this is the window that gains focus. However, this is not the case. If, when the switcher window previewer is still active, the tilde key is pressed for a second time, the window previews switch order and now when alt is released the currently selected window preview will be given focus. After the second tilde press, subsequent tilde presses won't switch the window order and the correct window is given focus. Releasing the alt key at any point resets everything.

Similar to alt+tilde is alt+tab when the option "Automatically grid windows on timer in switcher" is selected in CompizConfig Settings Manager -> Ubuntu Unity Plugin -> Switcher Tab. However, when this window preview is initialized with alt+tab, there is NO issue.

[Launchpad Janitor (janitor)]

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

[Tomas Cassidy (tomas-cassidy)]

ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
Package: unity 5.14.0-0ubuntu1
PackageArchitecture: amd64
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Tags: precise running-unity
Uname: Linux 3.2.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: sudo

[Tomas Cassidy (tomas-cassidy)]

apport information

[Tomas Cassidy (tomas-cassidy)]

apport information

[Omer Akram (om26er)]

Thanks for the bug report. This particular bug has already been reported and is a duplicate of bug 1035668, so is being marked as such. Any further discussion regarding the bug should occur in the other report. Feel free to report any other bugs you may find.