Video driver is only allowing 60hz refresh i know the card can handle 75HZ need update as screen refresh is visible

How did you edit /etc/X11/xorg.conf ?

Hi Andrea,

At first i changed the name of the driver from ati to radeon as all the docs i could find would list radeon as as being the right one for my installation, after failing i changed the horizontal and vertical sync values to try and increase the refresh rate but none of these worked.

Mh... not good.
Boot in the recovery mode and follow those steps:
1. If you made a backup copy of the file:
  Type:
  cd /etc/X11 && ls
  You will get a list of files in the directory. Once you have found your backup, type this command:
  mv backup-file xorg.conf
  (replace "backup-file" with the real name of the file)
2. Otherwise (or if you find he method 1 too difficult):
  sudo dpkg-reconfigure xserver-xorg

My Xorg file is fine i was able to return it to it's original state by booting up with the live CD and changing it, however my screen refresh is still poor and there are no drivers that i can find that are better than the one i have. any suggestions?

Open xorg.conf

sudo gedit /etc/X11/xorg.conf

In Section "Monitor" typ the real values for Horsync e Vertrefresh, see in builder website.

In Section Screen, down Defaultdepth add this line:

Option "metamodes" "1280x1024_75 +0+0; 1280x1024 +0+0; 1024x768 +0+0; 800x600 +0+0; 640x480 +0+0"

In 1280x1024 you put yoy Resolution and in 75 you put your Refresh Rate.

Ok?

An easy way is add to the available resolutions x75. For example:
# From
SubSection "Display"
                Depth 24
                Modes "1280x1024" "1024x768" "800x600" "720x400" "640x480"
EndSubSection

# To
SubSection "Display"
                Depth 24
                Modes "1280x1024x75" "1024x768x75" "800x600x75" "720x400x75" "640x480x75"
EndSubSection

I changed the values to
SubSection "Display"
                Depth 24
                Modes "1280x1024x75" "1024x768x75" "800x600x75" "720x400x75" "640x480x75"
EndSubSection
and it booted fine with no errors however when i open system > Preferences > screen resolution it is still 60HZ and there are no otrher values in the list and the refresh is still visible.

any other suggestions if not i might just have to purchase another graphics card. one that the manufacturer has a driver for.

Try to follow Daniel's suggestion :D

I tried daniels suggestion but still nothing. i'm curious to know, in the screen resolution changer in gnome exactly what part of the xorg.conf file does it get the regresh rate value from.

Thanks Andrea Corbellini, that solved my question.

What i did here is just increase the values of the horizontal sync and the vertical refresh to 100 as i did when editing the xorg.conf file.

Thanks very much for your help.......legend!