On 02/26/2013 09:28 AM, Mark Stodola wrote:
> On 02/26/2013 09:50 AM, Joseph Areeda wrote:
>> Greetings,
>>
>> I'm running SL6.3 with a GTX 670 in a dual monitor (etended desktop)
>> setup using DVI connectors.
>>
>> There are a few applications that need libXrandr and other applications
>> that use the GPU for processing and need the nVidia proprietary drivers.
>>
>> Is it as simple as installing libXrandr?
>>
>> It seems as though RandR is available before I install the nVidia
>> drivers but is removed when on install or switching to Xinerama which
>> makes me suspect they are incompatible.
>>
>> So far I've been living without the apps that require RandR or run them
>> in a VNC window.
>>
>> I'd really appreciate a reference that explains the problem or even
>> better the solution.
>>
>> Thanks,
>>
>> Joe
>
> Joe,
>
> It may depend on which driver you are running.  Better support for the 
> RandR features started occurring in driver series 302.  If the output 
> of 'xrandr -q' doesn't work, you may have to add 'Option 
> "RandRRotation"' to your Xorg configuration file.  I believe their is 
> also an option in nvidia-settings when properly enabled.  Some 
> settings may create an incompatibility.  For example, enabling SLI 
> breaks rotation ability. You may also suffer performance issues when 
> using it.
>
> I'd recommend checking /usr/share/doc/nvidia*/ for information on the 
> specific version you are running.
>
> Also, I would recommend you use the kmod packaged driver from ELrepo 
> as opposed to the binary directly from nvidia if possible.
>
> Regards,
> Mark
>
Thanks Mark!

I am using the kmod version 310.32 (at least on the one I am using).   
Interestingly xrandr -q works on some systems but not others.  Perhaps 
because some were upgraded from previous versions of SL6.

You've given me a way to proceed and I appreciate it.

Best,
Joe