I don not know if the PC-BSD developers enabled <ctl><alt><bksp> but it is disabled by default in FreeBSD 8.2
http://www.freebsd.org/doc/en_US.ISO.../x-config.html
Quote:
Note: In Xorg versions up to 7.3, the Ctrl+Alt+Backspace key combination could be used to break out of Xorg. To enable it in version 7.4 and later, you can either type the following command from any X terminal emulator:
% setxkbmap -option terminate:ctrl_alt_bksp
or create a keyboard configuration file for hald called x11-input.fdi and saved in the /usr/local/etc/hal/fdi/policy directory. This file should contain the following lines:
<?xml version="1.0" encoding="ISO-8859-1"?>
<deviceinfo version="0.2">
<device>
<match key="info.capabilities" contains="input.keyboard">
<merge key="input.x11_options.XkbOptions" type="string">terminate:ctrl_alt_bksp</merge>
</match>
</device>
</deviceinfo>
You will have to reboot your machine to force hald to read this file.
The following line will also have to be added to xorg.conf.new, in the ServerLayout or ServerFlags section:
Option "DontZap" "off"
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You might want to look at the Xorg.0.log in /var/log. The system usually keeps the last 2 instances.
If you want to try to startx without the graphical login, at the graphical screen <ctl><alt>F2 which should give you a login prompt. Login and then