worked fine in bt4-pre-final and bt3, but not bt4-final :-(

--------------------

X: warning; process set to priority -1 instead of requested priority 0

X.Org X Server 1.5.2
Release Date: 10 October 2008
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-19-server i686 Ubuntu
Current Operating System: Linux bt 2.6.30.9 #1 SMP Tue Dec 1 21:51:08 EST 2009 i686
Build Date: 09 March 2009 10:48:54AM
xorg-server 2:1.5.2-2ubuntu3.1 (buildd@rothera.buildd)
Before reporting problems, check X.Org Wiki - Home
to make sure that you have the latest version.
Module Loader present
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: Wed Jan 13 18:56:45 2010
(==) Using config file: "/etc/X11/xorg.conf"
(EE) GARTInit: Unable to open /dev/agpgart (No such file or directory)
FATAL: Could not load /lib/modules/2.6.30.9/modules.dep: No such file or directory
(EE) [drm] drmOpen failed.
(EE) intel(0): [dri] DRIScreenInit failed. Disabling DRI.
(EE) intel(0): Failed to allocate framebuffer. Is your VideoRAM set too low?
(EE) intel(0): Couldn't allocate video memory

Fatal server error:
AddScreen/ScreenInit failed for driver 0

giving up.
xinit: Connection refused (errno 111): unable to connect to X server
xinit: No such process (errno 3): Server error.