Hi

    I've been having trouble with XFree86 3.3.6 on FreeBSD 4.3 recently.
Below is the error log I received when entering the command startx. I hope
someone can help. I looked this problem up on the net but the only
suggestion I could find to fix this problem was to disable the kernel
security - I have tried this and have had no luck.

XFree86 Version 4.0.3 / X Window System
(protocol Version 11, revision 0, vendor release 6400)
Release Date: 16 March 2001
 If the server is older than 6-12 months, or if your card is
 newer than the above date, look for a newer version before
 reporting problems.  (See http://www.**-**.com/ )
Operating System: FreeBSD 4.2-BETA i386 [ELF]
Module Loader present
(==) Log file: "/var/log/XFree86.0.log", Time: Tue May  8 08:17:27 2001
(==) Using config file: "/etc/X11/XF86Config"
Markers: (--) probed, (**) from config file, (==) default setting,
         (++) from command line, (!!) notice, (II) informational,
         (WW) warning, (EE) error, (??) unknown.
(==) ServerLayout "Simple Layout"
(**) |-->Screen "Screen 1" (0)
(**) |   |-->Monitor "My Monitor"
(**) |   |-->Device "SiS 620"
(**) |-->Input Device "Mouse1"
(**) |-->Input Device "Keyboard1"
(**) Option "AutoRepeat" "500 30"
(**) Option "XkbRules" "xfree86"
(**) XKB: rules: "xfree86"
(**) Option "XkbModel" "pc104"
(**) XKB: model: "pc104"
(**) Option "XkbLayout" "us"
(**) XKB: layout: "us"
(**) FontPath set to
"/usr/X11R6/lib/X11/fonts/local/,/usr/X11R6/lib/X11/fonts/misc/,/usr/X11R6/l
ib/X11/fonts/75dpi/:unscaled,/usr/X11R6/lib/X11/fonts/100dpi/:unscaled,/usr/
X11R6/lib/X11/fonts/Type1/,/usr/X11R6/lib/X11/fonts/Speedo/,/usr/X11R6/lib/X
11/fonts/75dpi/,/usr/X11R6/lib/X11/fonts/100dpi/"
(**) RgbPath set to "/usr/X11R6/lib/X11/rgb"
(==) ModulePath set to "/usr/X11R6/lib/modules"
(WW) checkDevMem: failed to open /dev/mem (Operation not permitted)
 linear framebuffer access unavailable
(--) Using syscons driver with X support (version 2.0)
(--) using VT number 9

Fatal server error:
xf86EnableIO: Failed to open /dev/io for extended I/O

When reporting a problem related to a server crash, please send
the full server output, not just the last messages.
This can be found in the log file "/var/log/XFree86.0.log".
Please report problems to xfre...@xfree86.org.

I beleive I had this problem and some others. I ran /stand/systintall
and selected the medium security policy and that fixed part of my problems.
I also had to create a .fvwm2rc file to get fvwm2 to start.

Did you reboot after making the change?

you are actually runnign 4.0.3