Hi all!
Could anyone please help me with the following thread:
In the "settings" menu of System->administration->Display panel I can choose only between 1024x768, 800x600 and 640x480 resolutions, though native resolution should be 1200x800. In the ""Hardware" menu I choose Monitor type - LCD Panel 1200x800, and the video card is Intel Corporation Mobile 915GM/GMS/910GML Express graphic controller, which is correct. The point is that at 1024x768 everything looks unfocused, and I just can't switch to 1200x800.

After I press ok I get the message:

Display settings changed

You need to log out and restart the X server for the changes to take effect.
Configuration was written to /etc/X11/xorg.conf, original configuration saved as /etc/X11/xorg.conf.backup.

One more thing - when I change Monitor type in the "Hardware" menu to LCD Panel 1024x768(for example), press ok and reenter this menu nothing changes - it is LCD Panel 1200x800 again. The only way I found to fix it is to change "ModelName" in xorg.conf manually:

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor0"
ModelName "LCD Panel 1280x800"
### Comment all HorizSync and VertSync values to use DDC:
HorizSync 31.5 - 90.0
VertRefresh 59.9 - 60.1
Option "dpms"
EndSection

And one more questions - how do I restart the X server?
When I logout I am immediatly dropped to the gui login menu, which doesn't have a command prompt line.

I use Scientific Linux 5.1 which is rhel5 based, I guess. And I use gnome desctop.

Any help greatly appreciated!

If you're using gnome, perhaps you login gui is gdm. If you restart gdm, X restarts as well. To do that, perhaps you can simply press crtl+alt+backspace or restart the box; with my distro, you can switch into a tty (ctrl+alt+F1), login as root and enter "/etc/init.d/gdm restart" and the screen will change as if you pressed ctrl+alt+F7 (F* for other configurations/distros), i.e back to the login gui. But I'm not sure if the command-line works for other distros, so restarting is the safest method.

I did ctrl+alt+bkspace, and I hope I restarted X server by that, but the resolution is still 1024x768.
When I try /etc/init.d/gdm restart I get - Aborting! GDM already running.
But, I guess, this is not the thing preventing me from changing desktop resolution.
Thanks for reply.

P.S. I discowered lynx! It's awesome!)

in my xorg.conf, I define the highest and lowest resolution (4:3 format) :

Thanks for your assistance, TITiAN!
I guess I found the answer here: http://www.geocities.com/stomljen/