I saw you ask how to check the X logs. I'm brand new to Linux so I hope I'm helping you out here:
This will show you all the various log options you have:
ls -l /var/logs What I believe @Cristian was asking you to check out is this:
cat /var/logs/Xorg.0.log You can also weed through your messages maybe?
cat /var/logs/messages You can also view errors by using this command:
grep -i error /var/log/messages Not really sure if that will show you any error reports or not. Sorry, I know this doesn't answer your question.