Xubuntu Refresh Rate

[UnknownDemon]

Hello everyone
This morning I was looking around and went to the display settings and such. And I noticed refresh rate was at 75Hz. I changed it to 85Hz and the screen went black. I tryed to reboot but after I got passed the Login the screen went black again.
Now I want to change it back to 75Hz because the monitor wont allow it.
How do I change it back to 75Hz from the login screen? :/
Please help me correct this issue.

[devils casper]

Press Alt+Crl+F4. It will switch to command line, tty4. Login there and edit /etc/X11/xorg.conf file.

[UnknownDemon]

Press Alt+Crl+F4. It will switch to command line, tty4. Login there and edit /etc/X11/xorg.conf file.

I tryed to do so and I got this;
-bash; etc/x11/xorg.conf; no such file or directory.

[devils casper]

Execute this

sudo nano /etc/X11/xorg.conf

It's capital X in X11.

[UnknownDemon]

Thanks for the reply!
I did as you said and I got to a screen to edit xorg.conf, But the screen was blank with commands at the bottom. I dont know what I'm suppost to type in the xorg.conf to correct this issue.
I dont know what to do because I'm very new to linux I dont see how to edit xorg.conf cause I dont see anything to edit!

[devils casper]

Do you have LiveCD of any Linux distro? It will be very easy to fix problem using LiveCD. You have to mount / partition in LiveCD and edit xorg.conf file.


It isn't easy to edit xorg.conf file in command line mode. IN case you don't have LiveCD. copy contents given below and paste/type in empty xorg.conf file.

Section "Device"
       Identifier "Configured Video Device"
       Driver    "vesa"  
EndSection

Section "Monitor"
         Identifier "Configured Monitor"
         HorizSync 31.5 - 70.0
         VertRefresh 50 - 160
 EndSection

Section "Screen"
        Identifier "Default Screen"
        Monitor "Configured Monitor"
        Device "Configured Video Device"
        DefaultDepth 24
        Subsection "Display"
             Depth 24
             Modes "1280x1024" "1024x768" 
        EndSubsection
EndSection

[UnknownDemon]

Thanks for the reply!
I Copy/pasted the codes and I saved and booted up but now the login screen wont show up.
And yes I do have a liveCD but the CD-ROM drive wont work. In the BIOS it said the CD-ROM drive isn't installed so i guess i'm stuck.

[devils casper]

Linux is case sensitive. Did you copy exact contents?
Which Graphics Card do you have?

In case nothing works, rename xorg.conf file.

cd /etc/X11
mv xorg.conf xorg.conf_bak

[Segfault]

@devils casper

Can user in Ubuntu change xorg.conf? I mean when OP changed refresh rate, how he did it? Not a Gnome user myself, but isn't there a setting in ~/.config/ responsible for this?

[Segfault]

@UnknownDemon

There used to be a key combination to step thru available screen modes, try holding down Alt+Ctrl and hit - (minus) key. Wait a little and repeat. It may (or may not) work, depending how Ubuntu Xorg server is set up.