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73416ba
(Get the code!)
I have the same problems as well.
I have dual GeForce 9800 GTX+ cards running three monitors with SLI enabled. This is working very well. I was trying to enable the extra visual effects and get the error:...Well sometimes I get the error and sometimes it just locks up the Appearance Preferences window like just now...OK... I get ther error: The Composite extension is not available. And when you click OK on the dialogue box nothing happens, you have to click the X on the window to make the dialogue box go away.
I also have the issue when I cross from one screen to the other the mouse will continue to the next screen, but it will leave a mouse pointer on the previous screen at the point where the mouse crossed over.
I am running Ubuntu 9.04 Jaunty Jackalope with the nVidia 180 driver. I had the three monitor setup with 8.10/Intrepid and it didn't have the mouse pointer issue.
If I disable Xinerama then I have a task bar across every screen and I can't move a window from one screen to the other, but even worse when I open an application from one of the other screens it will put them all on the primary screen which renders my other two monitors useless.
I just wanted some eye candy, but I will just have to keep waiting.
Hardware:
02:00.0 VGA compatible controller: nVidia Corporation GeForce 9800 GTX+ (rev a2)
04:00.0 VGA compatible controller: nVidia Corporation GeForce 9800 GTX+ (rev a2)