Can you boot into KDE desktop? (or even boot from a Kubuntu Live CD temporarily) Then browse to /var/log/Xorg.0.log in the file system and double click it. If you then select the entire contents, you can copy and paste it into www.pastebin.com
.... then copy the link it produces and paste it here (this is the correct way of posting large volumes of text in a way that doesn't make the forums very untidy).
You can read the file in a terminal (either on the machine itself by switching to another terminal screen - press ALT-F1/2/3/4/etc and log in - or by using Putty (or another ssh program) on a remote computer and connecting to the LMCE machine via its IP address, then logging in.....
less /var/log/Xorg.0.log (note the X is capital) and use page up and down to read through it. It is a long file, and you should read through it carefully. But if you post a pastebin link to it here we can take a look, too.