:~# startx
X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-30-server x86_64 Ubuntu
Current Operating System: Linux bt 3.2.6 #1 SMP Fri Feb 17 10:34:20 EST 2012 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.6 root=UUID=fc47a47b-f520-4671-a7c8-118730540b5b ro text splash vga=791
Build Date: 25 February 2012  06:57:33AM
xorg-server 2:1.7.6-2ubuntu7.11 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.16.4
        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 Apr 16 21:32:29 2012
(==) Using config directory: "/usr/lib/X11/xorg.conf.d"
(EE) AIGLX error: vboxvideo does not export required DRI extension
(EE) AIGLX: reverting to software rendering
(EE) VirtualBox USB Tablet: failed to initialize for relative axes.