Bumpymail posted on Sun, 13 May 2012 08:27:32 -0700 as excerpted:
> Tried to change the line "Option "Composite" "Disable" using
> bump@bumpykdeputer:/etc/X11$ sudo chmod a+rw xorg.conf
> bump@bumpykdeputer:/etc/X11$ sudo chmod 744 xorg.conf neither work,
> (most unusual as I've done it many time
Installed kubuntu 12.04 from a LiveCD.
Kubuntu auto installed my Nvidia GeForce GTX 550 Ti set to TwinView.
PROBLEM: On opening System Settings-Desktop effects Cannot enable Desktop
Effects: Message: "Required X extensions (XComposite and XDamage) are not
available.".
Ran utility "Additional Dri