X doesn't work properly FreeBSD 7.1 P3 (i386) on Fujitsu Lifebook S7110

After installing x11/xorg from ports on a Fujitsu laptop with FreeBSD 7.1 P3 (i386) , ports tree refreshed 2/26/2009, I experienced multiple problems getting X to work:

* When X started, mouse and keyboard didn't work. Both built-in and external USB mouse/keyboard combinations didn't work even though both internal and external work fine in text console.
* Killing the X process causes laptop to abruptly reboot or kernel panic. This happened every time the X server was killed (since I couldn't shut it down with mouse or keyboard.)

Fixes/Workarounds:

1. disabled kernel drm module:

cd /boot/kernel
mv drm.ko drm.ko.off

2. added the following section to /etc/X11/xorg.conf after "ScreenLayout" section.

Section "ServerFlags"
Option "AllowEmptyInput" "off"
Option "AutoAddDevices" "off"
EndSection


References:
http://www.nabble.com/Xorg-7.4-causing-kernel-to-crash-in-7.1-RELEASE-td21710284.html
http://www.nabble.com/Xorg7.4-with-hal:-no-keyboard.-td21778969.html
 
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