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I'm running Ubuntu 13.10 and am having trouble with nvidia-settings. I've got two monitors and two Gtx 560tis running SLI. I plugged both monitors into one card and when I run nvidia-settings using sudo I can change the monitor rotations, positions etc and save and it works. However, rebooting I lose all my changes.

I did a bit of research and found I have to tell nvidia-settings to save to the X config file. I tried finding the existing xorg.conf or xorg.conf.d and found nothing on my computer.

If I save in /etc/X11/xorg.conf(.d) when I boot up I get an error saying there is something wrong with my graphics card or with my X settings. I have to access the shell and delete the file and reboot.

if I save in /usr/share/X11/20-nvidia.conf XORG crashes at boot but renames the file to a .backup and is able to recover (with none of my settings saved). The crash report includes

 Xorg crashed with SIGABRT in OsAbort()

.proc.driver.nvidia.gpus.0

    Error:[Errno 21] Is A directory:'/proc/driver/nvidia/gpus/o'

.proc.driver.nvidia.gpus.1

    Error:[Errno 21] Is A directory:'/proc/driver/nvidia/gpus/1'

Am I doing something wrong or does this sound like a bug in the driver/settings panel (I've found a few of those logged).

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