# cat /var/log/lightdm/x-0.log

X.Org X Server 1.11.3
Release Date: 2011-12-16
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.42-37-generic x86_64 Ubuntu
Current Operating System: Linux testing 3.2.0-48-generic #74-Ubuntu SMP Thu Jun 6 19:43:26 UTC 2013 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-48-generic root=UUID=d96df522-509d-47ee-a70d-9bb5930f4106 ro quiet splash vt.handoff=7
Build Date: 11 April 2013  01:05:39PM
xorg-server 2:1.11.4-0ubuntu10.13 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.24.4
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Jul  1 11:55:52 2013
(==) Using system config directory "/usr/share/X11/xorg.conf.d"