xen3 dom0: X server hangs

[Hubert Feyrer <hubert%feyrer.de@localhost>]

I got a machine in my fingers that recently got upgraded from 
Xen2/some_old_NetBSD to Xen3/NetBSD-4.0_BETA2, for both the dom0 and 
domUs. The machine ran X fine before, but with Xen3, the X server seems to 
hang shortly after starting (not immediately - xorgcfg gets displayed 
properly, and I can click around  a bit before the lockup happens).

I've tried netbsd-4's builtin xsrc as well as pkgsrc/*/xorg, both end with 
the X server spinning in a close loop:

  1629      1 Xorg     PSIG  SIGALRM caught handler=0x80dc560 mask=())
  1629      1 Xorg     CALL  setcontext(0xbfbfe7b8)
  1629      1 Xorg     RET   setcontext JUSTRETURN
  1629      1 Xorg     PSIG  SIGALRM caught handler=0x80dc560 mask=())
  1629      1 Xorg     CALL  setcontext(0xbfbfe7b8)
  1629      1 Xorg     RET   setcontext JUSTRETURN

As this is a demo machines for showing NetBSD at roadshows, getting X 
going would be sort of nice.

Can someone tell me what I've missed? Thanks!


 - Hubert