How to set monitor frequency?

[Vimala L]

Hello there.

I have problem using Compaq TFT 1501 monitor with linux OS.

I have the following:
Compaq TFT1501 monitor
Compaq Evo D320 machine (Intel P4 2.4GHz, Extreme Graphics)
Redhat Linux 8.0 and WindowsXP Professional.

The monitor works fine when I boot with WindowsXP. But when I boot with linux OS, there is a small box moving always on the screen with the message with the meaning "set the monitor to 1024 x 768 @75 Hz."

When I run linux, the buttons on the Monitor don't have any effect. While running WindowsXP, ofcouse all the buttons function properly.

Though I'm able to set the resolution using some of the setup utility in linux, I can not set the frequency to 75Hz.

The display in the screen is also not very clear and it is cut about a inch size in the left.

Your inputs to solve this problem are very much appreciated.

Thank you.
Vimala.
04-Mar-2003

[Stuart Browne]

Look at the file '/etc/X11/XF86Config', and the 'Section "Monitor"'.

It shows here the 'HorizSync' and 'VertRefresh' rates.

I beleive you'll want to 'tweak' the 'VertRefresh' values to something that your monitor can handle.

[Bruce Copeland]

Also on newer versions of XFree86, there sometimes aren't any lines for HorizSync or VertRefresh in the "Monitor" section of the XF86Config file. So in that case you need to create them. These lines are sometimes specified as a range, e.g.

HorizSync 31.5 - 48.5
VertRefresh 40.0 - 70.0

though they don't have to be.

Bruce