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I have Gnome Shell, Unity and Xubuntu on my computer and I would like to use compiz in Xubuntu. Whenever I put in "compiz --replace" it changes my window's theme from Greybird to Gnome's Ambiance. It doesn't seem like I can change it back in Xubuntu's settings menu, when I click on Window Manager, everything is blank. Any suggestions?

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When you use "compiz --replace", you are replacing xfwm4 with compiz. That means the xfwm4 window manager is no longer running. Since greybird is part of xfwm4, it won't run either.

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You can try just logging out and back in as another shell (Click the gear) to get back into the settings. As well I got the Compwiz manager when I was messing around with it.

sudo apt-get install compizconfig-settings-manager

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If this doesn't work you may have to edot the ~/.config/xbuntu-session file to include the compiz profile – Ringtail Mar 7 '12 at 20:12

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