10.4. Troubleshooting Your
Video card configuration is handled during the Red Hat
Enterprise Linux installation (refer to the Red Hat Linux Installation Guide for more
information). However, if you did not choose to configure a video
card at that time, or if you need to reconfigure your settings, you
can use the X Configuration Tool
utility. Use this utility if you install a new video card.
The X Configuration Tool backs up
your system's original video configuration file to /etc/X11/XF86Config.backup in case you need it to
switch back to a previous configuration.
To run the X Configuration Tool,
click => => . A pop-up window prompts you for your
root password. You can also start from a shell prompt by typing the
command system-config-xfree86, which then
prompts you to enter your root password. If you are working from a
shell prompt and X is not working, system-config-xfree86 attempts to start a minimal X
session to allow you to continue your configuration.
If you have recently entered your root password for a different
application, you may not be prompted to enter it again.
Figure 10-6. X Configuration Tool
To configure your monitor manually, click the Hardware tab, then click the Configure... button next to the Monitor Type entry. A pop-up window displays a list
of monitor models. Choose your model and click OK. You can also let the X
Configuration Tool probe your monitor for the correct model and
vertical/horizontal frequency settings.
To configure your video card manually, click the Hardware tab, then click the Configure... button next to the Video Card entry. A pop-up window displays a list of
video card models. Choose your model and click OK. You can also let the X
Configuration Tool probe your video card for the correct model
and settings by clicking the Probe
When you have finished reconfiguring your video card and
monitor, you should be able to start an X session and enjoy your
graphical desktop environment.