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[Xen-users] Re: graphically accessing pv guest

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Ted Brenner <griztown@xxxxxxxxx>
  • Date: Sun, 27 Feb 2011 21:15:24 -0600
  • Cc: "Fajar A. Nugraha" <list@xxxxxxxxx>
  • Delivery-date: Sun, 27 Feb 2011 19:16:54 -0800
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Is it possible that in Xen 4.0+, the 'xenfb.video' should be added to the kernel line of the /boot/grub/menu.lst file?

On Sun, Feb 27, 2011 at 10:49 AM, Ted Brenner <griztown@xxxxxxxxx> wrote:
Hi all,

I'm trying to expand the screen resolution of my guest when using vnc.  It appears I need to use the extra variable in my guest config file and xenfb.  I pass it in like this:

extra = 'xenfb.video=8,1024,768'

I can see this being passed to the kernel when it boots but it doesn't change the vnc screen resolution.  I also see this when I type ps -ef | grep vnc

# ps -ef | grep vnc
root      7187  2103  0 10:18 ?        00:00:04 /usr/lib/xen-4.0/bin/qemu-dm -d 6 -serial pty -domain-name ubuntuWork -videoram 4 -vnc -vncunused -M xenpv
root      7445  2688  0 10:46 pts/0    00:00:00 grep vnc

So it appears the video ram is still 4MB.  Here's the line for vnc in my guest config file.

vfb = [ 'type=vnc,vncdisplay=1,vnclisten=' ]

My using Xen 4.0, Debian Squeeze for my dom0 and Ubuntu Maverick for the guest.


On Fri, Feb 25, 2011 at 9:16 AM, Fajar A. Nugraha <list@xxxxxxxxx> wrote:
On Fri, Feb 25, 2011 at 9:20 PM, Ted Brenner <griztown@xxxxxxxxx> wrote:
>> Although personally I like xrdp or NX better than vnc, the consep is
>> the same: you run it domU instead of relying on Xen's vfb.
> Thanks.  How are these differ performance wise?  Is vnc through Xen faster?
> How does these compare graphically to say, running an OS in Virtual Box?

If you're going to use it for desktop/laptop then I suggest go with
virtualbox instead. It's far ahead of Xen, being able to do seamless
and scale desktop.

Acessing vnc/xrdp/nx running in a domU is no different than  acessing
vnc/xrdp/nx running in a physical server on the network. Good, but not
as good as virtualbox's seamless window.

vnc access thru domU's vfb should really only be use for
administrative purposes. Sometimes you'll get mismatched mouse pointer
or other problems.


Ted Brenner
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