Panic while starting X server

[walt]

Kernel/quickworld built about an hour ago.  Boots fine, but
panics when trying to start X.
I too am new at kernel debugging, but here is what I have
so far:
#6  0x0 in ?? ()
(kgdb) f 6
#6  0x0 in ?? ()
(kgdb) l
566                             /*
567                              * The kernel may be using npx for copying or other
568                              * purposes.
569                              */
570                             if (npxdna())
571                                     goto out2;
572     #endif
573                             break;
574
575                     case T_PROTFLT:         /* general protection fault */
(kgdb) info local
No symbol table info available.  <dunno why...I have the -g thingy in my config>
Any other stuff I need to give you?  (Be specific ;-)