Hi David

I wasn't actually aware system-config-display had disappeared until you mentioned it. But this is the process I would suggest you start out with

At any time but preferably before you have bought the new card research its Linux Support. When doing this please don't assume just because I works in one distribution it will work in another. Specifically look at its CentOS / Red Hat support. If you are not sure where to start with this then I personally recommend Nvidia or ATI cards. This will lead some people into the debate about whether you should or shouldn't use drivers that are not open source. I am not going to say what you should do in relation to that debate but for myself I simply balance how simple I want things to be versus what functionality or performance do I need.

As to a process try this:

1. Check if the file /etc/X11/xorg.conf exists on your system. Assuming it does make a backup of it 2. Install your new card ensuring that the old one is disabled or removed 3. Boot into runlevel 3 4. Remove /etc/X11/xorg.conf 5. Use startx to manually start an X session. This hopefully will give you a X environment you can use that may need some tweaking.

6. Assuming the last step has worked reboot into runlevel 5 as normal. ( If this fails remember you can always go back to runlevel 3 to help diagnose issues as needed )

If step 5 fails then I would suggest you let us know what card specifically you are dealing with.

The only cards I would definitely avoid are those that use the intel driver

Hope this helps :)

On Sun, Feb 24, 2013 at 8:33 AM, David McGuffey davidmcguffey@verizon.netwrote:

I want to add a new video card that will drive multiple monitors. Current installation of CentOS 6.3 x86_64 is working well with the hdmi output of the motherboard.

Once I install the new video card, how do I force 6.3 to discover and configure it? Seems with 6.0 and newer, system-config-display is gone and replaced with a combination of udev and xrandr. I'm not familiar with these and don't want to mess up a working system. Tips/pointers to some decent guidance/how-to docs would be appreciated.

DaveM

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