XFree86 process gets stuck in *Giant

[Glenn Johnson]

I have had this happen a couple of times since running -CURRENT (since
about the days of 5.0-RELEASE).  My machine (an SMP box) will be
non-responsive, no graphics, no ability to use the mouse or keyboard.
Upon logging into another machine and using ssh to connect to the hung
machine, I can login to it, albeit very slowly.  Upon running 'top' I
see that the XFree86 process is stuck in *Giant and using > 100% of the
CPU (according to top).

The only way out is a reboot because if I kill the XFree86 process the  
machine will completely die.  Has anyone else seen this?  Is there      
something I can do to prevent it from happening?                        

Thanks.

-- 
Glenn Johnson
USDA, ARS, SRRC			 Phone: (504) 286-4252
New Orleans, LA 70124		e-mail: gjohnson at srrc.ars.usda.gov