Red Hat Knowledgebase

Release Found: Red Hat Enterprise Linux 3

To recover from incorrect monitor or video adapter settings, first try switching over to a text terminal. This can be done by pressing Ctrl+Alt+F1. Log in to the terminal as root and type the following command:

redhat-config-xfree86

The Display Settings window will appear. Click the "Advanced" tab. You will be presented with configuration options for the monitor and video adapter.

If you need to change the monitor, click the "Configure" button in the Monitor section. Select your monitor from the list on the left or click the "Probe Monitor" button to have the operating system try and auto-detect your monitor.

If your monitor is not listed, you can select "Generic LCD" or "Generic CRT" and adjust the frequency ranges for the monitor.

Caution:Please consult your monitor's documentation for these settings. Incorrect settings can lead to permanent damage to your monitor.

To change the video adapter settings, click the "Configure" button inside of the "Video Card" section. Select your video adapter from the list or allow the operating system to probe your card by clicking the "Probe Videocard" button.

If your adapter is not on the list, you can either select "Custom" or the generic "VESA" driver. Another option is to consult the website of the video card manufacturer to see if they have a driver available for Red Hat Enterprise Linux.

Once the changes are made you need to restart the X Server for changes to take effect. You can test this by running startx from the command line at the terminal or by rebooting the computer if your system is set up to boot to runlevel 5 (graphical login).