Panic or deadlock with Intel graphics

[Rem P Roberti]

>  In an attempt to diagnose why my Thinkpad R51 completely locks up 
> when trying to access X I have done the following.  I built a 
> debugging kernel, with KDB, DDB, WITNESS, INVARIANT*, AND DIAGNOSTIC 
> in addition to *BREAK_TO_DEBUGGER.  None of these things have yielded 
> any progress in isolating the issue.  Note that replacing the 'intel' 
> driver with the 'vesa' driver in /etc/X11/xorg.conf does not cause the 
> computer to hang.  The problem appears to be specific to the intel 
> driver.  Also, I have been unable to get a crash report (which is what 
> we were hoping to see in /var/crash) regardless of the debugging 
> options built into the kernel.
>
> I have attached the output of 'uname -a', 'dmesg', and 'pciconf -lv' 
> to this post.
>
>

I forgot to mention the output of pkg_info | grep 
xf86-video-intel...which is:

xf86-video-intel-2.7.1_3 Driver for Intel integrated graphics chipsets