In this case, it might be helpful to have a look at your xorg.conf (/etc/X11/xorg.conf) and your Xorg.0.log (/var/log/Xorg.0.log).
In this case, it might be helpful to have a look at your xorg.conf (/etc/X11/ xorg.conf) and your Xorg.0.log (/var/log/ Xorg.0. log).