Launcher randomly stops showing up when you move the mouse to the left of the screen. Randomly clicking on some window's title bar almost always fixes it

[Teo]

At random times, and very, very often (I haven't found out what triggers it), the Launcher stops showing up. That is, you move the mouse all the way to the left of the screen and the Launcher doesn't show up. You retry and retry but it won't show up.

Clicking randomly on some window's titlebar and retrying usually fixes it. Most of the times, clicking on some other part of a window other than the title bar won't do the trick. I'm not sure this is always the case, but I'm under the impression it's necessary to click on a window's titlebar, or at least that is far far more likely to do the trick.

This looks to me unrelated to #1225769, but I'm not sure; there may be some nontrivial relation. What I can say is that the steps described in 1225769 don't systematically reproduce this one, which is more random, but I can't tell for example whether or not having used Show Desktop is a necessary condition to observe this issue.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: unity 7.0.0daily13.06.19~13.04-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.4
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,vpswitch,mousepoll,compiztoolbox,snap,commands,place,resize,session,regex,grid,wall,move,gnomecompat,imgpng,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
Date: Sun Sep 15 22:25:37 2013
InstallationDate: Installed on 2010-06-23 (1180 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to raring on 2013-08-10 (36 days ago)

[Andrea Azzarone (azzar1)]

13.04 is no longer supported. Is this still a problem on 12.04/14.04/14.10?

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]