INFO:root:/usr/bin/do-release-upgrade running
DEBUG:root:creating backup '/etc/X11/xorg.conf.dist-upgrade-201805211052'
INFO:root:Removing nvidia from /etc/X11/xorg.conf
DEBUG:root:line '    Driver "nvidia"
' found
DEBUG:root:replacing with '#    Driver "nvidia"
'
INFO:root:saveing new /etc/X11/xorg.conf (commenting nvidia)