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Getting the Display to Work (Nvidia Video Cards)

Warning: The Nouveau driver doesn't support multiple video cards.

With previous versions of Fedora, RHEL and CentOS, it has been found that there was a need to install the appropriate graphics driver to allow the ability to “span” the desktop across multiple screens and also allow 3D acceleration.

The Nouveau driver is now a default driver for many Linux distributions.  The "Nouveau" video driver is the open source driver for nVidia video cards  It has been noted that 3D support isn't as good when compared to the nvidia drivers (glxgears provides an example for framerate comparsion).

With Nouveau being tightly integrated into many Linux distributions, it appears that it might be acceptable to use in some cases. For more information on nouveau, see http://nouveau.freedesktop.org/wiki/. Additionally it has been found that there are a few minor issues with using the nvidia drivers.

Some that have be issues tested and confirmed include:

  • Using gnome remote desktop (vin0-server), the nvidia drivers have problems and only "refreshes" the primary screen.

Nvidia Display Drivers (Advance Users Only)

  • Ensure you have the ELRepo repository installed, as given on "Updating to latest Software and Patches".
  • Start up a terminal, and with "root" permisions, issue the command yum install kmod-nvidia (For very old nvidia cards, you might have to use the kmod-nvidia-96xx package).
  • Note that installing the above package, the following arguements are added to the kernel line within the /etc/grub.conf file, these being nouveau.modeset=0 rdblacklist=nouveau
  • Once installed, a reboot of the machine is recommended to allow the nvidia kernel modules to load.

Adjusting the Resolution and other Display Properties

If using a NVIDIA display card with the NVIDIA drivers, it is suggested to use the nvidia-setttings program to configure the display properties.

To use this program, simply:

  • Start up a shell terminal as "root" or "superuser".
  • Issue the command nvidia-settings
  • Then to change display propertities, simply select the "X Server Display Configuration" as can be seen in the below image.

nvidia-settings image

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