UNIX for Dummies Questions & Answers

Dear Experts
How can I change the monitor specifications, specially type, Frequency and resolution in linux Redhat 9 or more??? after the linux installation.
Please advise
Thanks

Hi!
Try to run Xconfigurator

if that doesn't work, you need to (as root) edit your /etc/X11/XF86Config file.

Now, to change your Vertical refresh, find the line that says

VertRefresh xx-xx

where xx-xx is your current frequency range.
Change xx-xx to your preferred frequency in Hz.

i use 50-70 meaning that my monitor can use frequencies from 50 to 70 hz.

Now, the resolution.

Find this in the file:
Section "Screen"
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Subsection "Display"
Depth x
Modes "XXXxXXX" "XXXxXXX"


where Depth x is your display depth. If you're running on 16 Bit High color, it says 16. The Modes "XXXxXXX" "XXXxXXX" is the available resolutions for the current color depth.
These are quotation marks separated, so you can add or change what's in the quotation marks. The first resolution in the line is the default.
Example:

Modes "800x600" "640x480"

will set the available resolutions to 800x600 and 640x480 with 800x600 as default.

Tips:
Under the "Screen" section, you can change your color depth.
Simply Write:

DefaultColorDepth xx

where xx is your preferred color depth in bits.



Happy hacking!

Actually, there is an X program that is included with redhat 9... in X, go to /usr/redhat-config-X or some like named directory - i forget exactly what it's called, and run the program with the same name as that directory.

Also, by clicking on the K or G menu (depending on which DE you use), you can access the System-Settings submenu, and from there hit 'minitors' if the appropriate packages have been installed. Note that XConfigurator is in the XTools RPM, and is not installed by default.

In RedHat 9 its in both the KDE and Gnome main menu's under system settings / display.