Please try a suspend, try to "recover" X and attach the files '/etc/X11/xorg.conf', '/var/log/Xorg.0.log', '/var/log/Xorg.0.log.old' and '~/.xsession-errors' and the output of 'lspci -vvnn'?
Please try a suspend, try to "recover" X and attach the files '/etc/X11/ xorg.conf' , '/var/log/ Xorg.0. log', '/var/log/ Xorg.0. log.old' and '~/.xsession- errors' and the output of 'lspci -vvnn'?