xen crashes when DomU uses X11, after a while

[Michael Kell Jensen <mkj%micrun.net@localhost>]

Hi i have setup a netbsd dom0 in xen

uname -a for the
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NetBSD construction_xen.micrun.net 5.0.1 NetBSD 5.0.1 (GENERIC) #0: Thu 
Jul 30 00:08:07 UTC 2009 
builds%b7.netbsd.org@localhost:/home/builds/ab/netbsd-5-0-1-RELEASE/amd64/200907292356Z-obj/home/builds/ab/netbsd-5-0-1-RELEASE/src/sys/arch/amd64/compile/GENERIC 
amd64
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When booting into a xen Dom0, Netbsd amd64.
and starting up a Gui environemnt, it runs fine for a while, but after 
some short time, it get slow and then freezes.
I "heard" that this could be because im using the modular xorg. from 
pkgsrc. But i can't find a reference to that anymore.
When not using the xen hypervisor(?), i got no problems.

There nothing untowards in the Xorg.o.log file. (ie. no messages except 
for normal startup messages).

So does anyone have a clue as where to look?


i boot into this (line form boot.cfg, there is more)
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menu=Boot Xen with 256MB for dom0:load /netbsd-XEN3_DOM0 
console=pc;multiboot /xen dom0_mem=256M
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regards michael

ps i've heard that xen questions should be here rather than port-xen
i hope this is correct ?.