Earlier today I tried to do something with the settings so as to play games at higher refresh rate Here is the command I entered the command prompt
xfconf-query --channel=xfwm4 --property=/general/use_compositing --type=bool --toggle
I am a Linux noob, I'm using Ubuntu 19.04. Please help me so as to restore my system to the previous working state or at least make it work without loosing my data Thank you