x fails after dapper install

[Colin Brace]

I am unable to install Dapper on my laptop, a Pentium M from LinuxCertified (Breezy runs fine). I have tried both update-manager as well as a clean install.

The initial install pass goes ok, but after reboot I get a black screen at the point at which gdm should be launched. Here is :0.log:

X Window System Version 6.99.99.904 (7.0.0 RC 4)
Release Date: 14 December 2005
X Protocol Version 11, Revision 0, Release 6.99.99.904
Build Operating System:Linux 2.6.10 i686
Current Operating System: Linux cirrus 2.6.15-12-386 #1 PREEMPT Fri Jan 13 05:22:30 UTC 2006 i686
Build Date: 15 December 2005
        Before reporting problems, check http://wiki.x.org
        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: Tue Apr 25 17:07:13 2006
(==) Using config file: "/etc/X11/xorg.conf"
(WW) ****INVALID MEM ALLOCATION**** b: 0xffe80000 e: 0xffefffff correcting

   *** If unresolved symbols were reported above, they might not
   *** be the reason for the server aborting.

Fatal server error:
Caught signal 11. Server aborting

----

I also have the kern.log and xorg.0.log available it if would be helpful.