Xen users - Apr 2009 - I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0 with VNC enabled

I have a headless CentOS 5.3 box running Xen 3.3.1. The DomU (domcont)  
is running off a DRBD device and the network bridge (br0) is running  
over a bonded ethernet link. All network interfaces are running fine  
and the DRBD devices replicate over their respective links. The DRBD  
device that I am trying to boot off is /dev/drbd1 and is set to  
Primary on the Dom0 that is running this DomU.

The current configuration file for the DomU is as follows:

kernel = "/usr/lib/xen/boot/hvmloader"
builder = ''hvm''
memory = ''4096''
name = "domcont"
vcpus = 3
vif = [ ''bridge=br0'' ]
disk = [ ''phy:/dev/drbd1,hda,w'' ,''file:/mnt/images/ 
2003Srvx64CD1.iso,hdc:cdrom,r'']
device_model=''/usr/lib64/xen/bin/qemu-dm''
cdrom=''/dev/hdc''
ne2000=0
boot=''c''
sdl=0
vnc=1
vncviewer=0
stdvga=0

The DomU can boot if vnc=0 in the DomUs configuration file but as soon  
as I enable VNC it crashes with the following error in the qemu-dm log:

domid: 3
qemu: the number of cpus is 3
config qemu network with xen bridge for  tap3.0 br0
Watching /local/domain/0/device-model/3/logdirty/next-active
Watching /local/domain/0/device-model/3/command
qemu_map_cache_init nr_buckets = 10000 size 3145728
shared page at pfn efffe
buffered io page at pfn efffc
Time offset set 0
Register xen platform.
Done register platform.
medium change watch on `hdc'' (index: 1): /mnt/images/2003SrvCD1.iso
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0

When I run ''xm create domcont'' as root with vnc=1 in the
configuration
file the DomU immediately crashes and does not show when I run ''xm  
list''.

Thanks for your help in advance.

Regards,

Daniel Davis

Centre IT
Ph: 08 89520909
Fax: 08 89188001
Email: daniel@centreit.com.au

Tenancy 2A, Level 1
8 Gregory Tce
or PO Box 4293
Alice Springs
NT, 0870


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On Wed, Apr 8, 2009 at 7:03 PM, Daniel Davis <daniel@centreit.com.au>
wrote:
> cdrom=''/dev/hdc''
Try removing that line.

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