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[ubuntu] NVIDIA GeForce 9400M Ubuntu 9.04 64bt -rt kernel

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http://ubuntuforums.org – I have had a hell of a weekend trying to get the NVIDIA drivers to work on my DELL XPS Studio 1340. I have been using the real time kernel cause I want to use this to do some multi-track recording. Upon my initial installation of Ubuntu 9.04 64-bit, everything seemed to work great out of the box. However when I connected my Dell 20" LCD monitor I found that it was not detected. Works fine in Vista. So reading around I realized it's an issue with the NVIDIA drivers. I tried everything I could find on these forum. Turns out that only the beta drivers (NVIDIA-Linux-x86_64-190.xx) will support the 9400M. Now I was finally able to install this after realizing that it would only install on the generic kernel (2.6.28-15-generic). It seems to work but one question I have is how do I separate the desktop background for each screen? It just stretches it over both. Not a big deal but still annoying. Now I would really like this to work with the rt kernel so I could run ardour, jack, hydrogen, etc.. efficiently. Does anyone have any suggestions? Should I reinstall with the 32-bit? Ubuntu Studio?? Btw, when I attempt to install the drivers on the rt kenerl I get: "ERROR: Failed to build NVIDIA kenerel" Since it is installed and running on the generic kernel, i tried just booting up in rt and it doesn't work. I get something like this: "Ubuntu is running in low-graphics mode, NVIDIA: Failed to load the NVIDIA kernel module..." Please provide some help if you can. I'm pretty new to all this so excuse my lack of Ubuntu vocab. (Hardware)