I'm running RH 7.2 and have used a couple of monitors with no problem.

I just bought a nice new Sony flat screen monitor and it says I need to adjust my video card.

The monitor works fine during startup until my XWindows screen appears. At that point I get:

"Out of scan range
53.7 Khz / 85 Hz"

The documentation that came with the monitor says I need to use the old monitor and adjust the computer's graphics board.

The problem is that I can't figure out how to do that.

I saw some threads on LinuxQuestions.org that said to run 'XFree86 -configure'.

When I run that I get:
Fatal server error:
Server is already active for display 0
If this server is no longer running, remove /tmp/.X0-lock
and start again.

I'm guessing that is because the X Windows session is running.

I'm not sure how to either kill the X Windows session or get the server to boot without bringing up the X Windows session.

TIA,

You can 'vi' (or your 'fav' editor) your /etc/inittab file, in that file, you will see something like this:

id:5:initdefault:

change it to this:

#id:5:initdefault:
id:1:initdefault:

save the file, reboot. This will bring you up in 'single user mode', where you only get a 'console' log on. fix what you need to, and you can manually 'startx' to bring up x-windows, if it works, edit your /etc/inittab file and change it to this:

id:5:initdefault:
#id:1:initdefault:

and then you should be able to reboot and come up in multi-user mode, just like before. If your 'mods' to your X-windows are not working, have a look at your xlog file in (I'm not sure about RH), /var/log/XFree86.0.log file for hints on what might be wrong. Have fun!

just need to replace 5 in 'id:5:initdefault:' to 3 for multiuser textmode.reboot.From runlevel 3 try xf86config or Xconfigurator or something else.Change the settings into lower values.then 'startx' from command window.

Thanks for the replies. For some reason xf86config did not work but Xconfigurator worked.

All is now well. Well ....., I wouldn't go that far, but this problem is solved.