Do you have a nvidia card? If so, which one?
And which video driver do you have? Has it been recently updated?
This looks like the driver has been changed, and it no longer supports
desktop-effects, which is what has happened with the nvidia driver and
some old cards
** Changed in: compiz (Ubuntu)
Importance: Undecided => High
Status: Unconfirmed => Needs Info
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[apport] compiz.real crashed with SIGSEGV in outputDeviceForWindow()
https://launchpad.net/bugs/97423
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