Please, follow my instructions. Of course the file doesn't exists but you have to create it by using the commands I told you to use.Originally Posted by onlyOknows
Find the specs of your monitor (you can use Google) and find the Horizontal and the Vertical refresh of your monitor then put them instead of the default valuesOriginally Posted by onlyOknows
Then save the file.
If you do this using the graphic interface log out and then login (it should restart Xorg)