Method for adjusting screen refresh rate under Linux system

                        1. Back up first: sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.backup 2. Open xorg.conf: sudo gedit /etc/X11/xorg.conf 3. Please find the following paragraph in This change: Section "Monitor" Identifier "Generic Monitor" Option "DPMS" HorizSync 28-70 VertRefresh 43-60 EndSection Change these two sentences HorizSync 30-82 VertRefresh 50-85 Finally add this sentence: Section "Device" Add the following code before EndSecion. Option "DynamicTwinView" "False" This is to turn off the dual monitor! Save to restart! Ok Go directly to "sudo nvidia-settings" and set it up. Ubuntu is not counted as in windows. So you just need to set auto in nvidia x server settings in the system tool. First set the nvidia x server settings to what you want, then click on the application in the screen resolution of the preferences.