hang on startx with nvidia / also with emu10kx

Hi,

FreeBSD exxodus.fedaykin.here 7.0-CURRENT FreeBSD 7.0-CURRENT #9: Thu Sep 13 22:46:14 BRT 2007     lioux_at_exxodus:/usr/src/sys/i386/compile/LIOUX  i386

	-CURRENT as of today September 13th 2007 with latest ports.
xorg works fine if I launch it with tightvnc. However, the system
hangs if I try to startx using the nvidia driver. The same happens
if I try to kldload emu10kx.

	How do I force the system to issue a kernel dump when it
hangs? I want to be able to provide a proper backtrace of the system
if possible. :)

	Are these known issues?

	Regards,

-- 
Mario S F Ferreira - DF - Brazil - "I guess this is a signature."
feature, n: a documented bug | bug, n: an undocumented feature