@Abhijit: please download the attached file and type the following commands: cd path_to_the_downloaded_xorg_conf sudo mv -f xorg.conf /etc/X11/
Then restart your computer, see how it goes, and finally attach your /var/log/gpu-manager.log and /var/log/Xorg.0.log
@Abhijit: please download the attached file and type the following commands: the_downloaded_ xorg_conf
cd path_to_
sudo mv -f xorg.conf /etc/X11/
Then restart your computer, see how it goes, and finally attach your /var/log/ gpu-manager. log and /var/log/Xorg.0.log