Hello,
I'm also seeing this. I have DQ35JO motherboard and a Q6600 processor. I have the latest 933 bios for my motherboard. It hangs for me at "Brought up 4 CPUs." I've gone through many many different distros and can't find a solution. I've also tried xen-unstable, but then vt-d does not get enabled. I get "I/O Virtualisation disabled."
Any ideas?
Thanks,
-Bryan
Venkat,
 Which CPU and motherboard/chipset are you using?  Have you verified that:
 #1. You have an Intel VT-d capable motherboard?
 #2. Intel VT-d is turned on in the BIOS?
 Cheers,
 Daniel
 Kumar, Venkat wrote:
   After building Xen-3.2.1 I could successfully boot into it if I avoid giving
   vtd=1 as the boot parameter.
   If I pass vtd=1 as the boot parameter to xen, the system hangs while
   booting.
   The system hangs after the following messages
   ============================
   Boot messages
   [XEN].....
   [Xen] Brought up 2 CPUs...
   =========================
   After sometime an error message is popped related to "DMAR".
   Is it due to improper build of xen-3.2.1.Any idea??
   Thx,
   Venkat
   ================================
   Venkata Kumar Duvvuru,
   LSI Engenio,
   Adv. Development,
   Bangalore.
   Mob: +91-9880318542
   Off : +91-80-41978700 ( Extn : 3544 )
   ================================
     ----------------------------------------------------------------------
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--
Daniel Kao
Uebermind, Inc.
Seattle, WA, U.S.A.
References