Problem with xorg in PRERELEASE 7

[Moretti Filippo]

I moved from 6.2-STABLE to 7.0 succesfully via src upgrade.
I cannot start xorg
X Protocol Version 11, Revision 0
Build Operating System: FreeBSD 7.0-PRERELEASE i386
Current Operating System: FreeBSD sting.2ainfo.it 7.0-PRERELEASE FreeBSD 
7.0-PRE
RELEASE #1: Sat Oct 20 05:31:38 CEST 2007     
root at sting.2ainfo.it:/usr/obj/usr/
src/sys/STING i386
Build Date: 20 October 2007  09:56:00PM 

       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: Thu Oct 25 10:35:33 2007
				(EE) Unable to locate/open config file
				New driver is "mga"
				(==) Using default built-in configuration (55 lines)
				(EE) Failed to load module "fbdevhw" (module does not exist, 0)
				
				Fatal server error:
				Caught signal 8.  Server aborting
				
				XIO:  fatal IO error 53 (Software caused connection abort) on X server 
":0.0"
				      after 0 requests (0 known processed) with 0 events remaining.
I cannot find in the driver section of ports fbdevhw module to install
Any help greatly appreciated.
Filippo