I have Red Hat 8.0 runninng on a Toshiba Satellite 5100. Now I want to use a FLATRON LCD 568LM moniter via a USB cable. When I boot up, the text linux boot appears on the new moniter, but when it is time for the blue screen, the moniter goes black except for an error window which says
"out of frequency" ...tthen powersave....then times out in seconds
(i'm pretty sure this window is generated by the moniter itself).

I have tried changing

usr/X11R6/lib/X11/XF86Config

so that the horizontal and vertical scan ratess are what is specified in
the specs for this monitor, but the same problem occurs.

Is there another obvious thing to try?
How do you diagnose a problem like this?

I am just learning my way arround Linux, so any detailed info would be appreciated.

Thanks
Riddley

isn't XF86Config in /etc/X11??

(going from memory - but take a look...)

Try turning on an option on your monitor that reports the video mode. On my LCD, I found that a similar problem for me was that it was trying to run at 83Hz.

Genesee - you are right, it was just a link in the dir i quoted. So I edittedd the fille you mentioned and the problem perssisted.

lectraplayyer - how do i access those options?

thanks,
Riiddley

It would probably be those buttons at the bottom of most monitors. However, it has to be in a "good" mode (while booting is a good time). It's usually under some type of advanced monitor, or it may be obvious from the main menu. Search throughout your monitor config menus. (IE as if you were going to adjust brightness, contrast, geometry, color, etc.) If possible, try setting it so that it gives you mode info. when video modes are changed. It should flash up a box saying what mode you're in (IE 1024X768 85Hz) when you change modes. That tells you a lot about your situation (but I see you seem to have it cured )