[Bug 159409] Compiz fails to startup if "show icons on desktop" is disabled in KDE ("Error: Another window manager is already running")

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Binary package hint: compiz

I've used compiz from time to time in KDE by running "compiz --replace"
(also during the late Gutsy development cycle), but now that I've tried
it again (after a few days or weeks) on Ubuntu Gutsy, it fails:

$ compiz --replace
Checking for Xgl: not present.
Detected PCI ID for VGA: 05:00.0 0300: 10de:0140 (rev a2) (prog-if 00 [VGA])
Checking for texture_from_pixmap: present.
Checking for non power of two support: present.
Checking for Composite extension: present.
Comparing resolution (1920x1200) to maximum 3D texture size (4096): Passed.
Checking for nVidia: present.
Checking for FBConfig: present.
Checking for Xgl: not present.
Starting kde-window-decorator
/usr/bin/compiz.real (core) - Error: Another window manager is already running on screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :0.0

It does still work with Gnome. I've also rebooted already after noticing
this problem.

** Affects: compiz
     Importance: Undecided
         Status: New

** Affects: kdebase
     Importance: Unknown
         Status: Confirmed

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

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Compiz fails to startup if "show icons on desktop" is disabled in KDE ("Error: Another window manager is already running")
https://bugs.edge.launchpad.net/bugs/159409
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