cat /var/log/Xorg.0.log.old| grep EE -B 5 -A 5
[ 20569.467] Current version of pixman: 0.33.6
[ 20569.467] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[ 20569.467] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 20569.467] (==) Log file: "/var/log/Xorg.0.log", Time: Tue May  3 17:37:19 2016
[ 20569.485] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 20569.494] (==) No Layout section.  Using the first Screen section.
[ 20569.494] (==) No screen section available. Using defaults.
[ 20569.494] (**) |-->Screen "Default Screen Section" (0)
--
[ 20570.183] (==) RADEON(0): Silken mouse enabled
[ 20570.183] (II) RADEON(0): RandR 1.2 enabled, ignore the following RandR disabled message.
[ 20570.183] (--) RandR disabled
[ 20570.188] (II) SELinux: Disabled on system
[ 20570.188] (II) AIGLX: Screen 0 is not DRI2 capable
[ 20570.188] (EE) AIGLX: reverting to software rendering
[ 20570.202] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[ 20570.202] (II) AIGLX: Loaded and initialized swrast
[ 20570.202] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[ 20570.203] (II) RADEON(0): Setting screen physical size to 700 x 270
[ 20570.302] (II) config/udev: Adding input device Sony Vaio Keys (/dev/input/event9)