Fwd: [Xen-users] Re: Newbie: How to run Xwindows in the guest OS

[Michael Kowalchik <mike.pk@xxxxxxxxx>]

I think you're going to want an Xserver thats not on a domU machine,  
I'm using Apple's X11 Xserver to connect to X on my domU machines.
For something on the same physical machine, if you can get an X  
session running on the Dom0 machine I imagine you could use an ssh  
tunnel to the DomU machine and run 'gdmflexiserver --xnest' (assuming  
you're running gdm)  and it will run an X session from the domU  
machine in a window on the dom0 machine (I'm guessing, my dom0 is  
very sparse with no X). I just started playing with this so I'm sure  
there's a better way, I just haven't figured it out. I'm using ssh  
from my mac and then this command to bring up a gnome desktop in a  
window.
Oh and if you want to change the geometry of the window with the  
gdmflexiserver command above you have to change the xnest entry in  
gdm.conf
I found a paper on gdm useful http://www.gnome.org/projects/gdm/ 
gdmtalk.pdf .
-MK


On Sep 22, 2005, at 5:05 AM, Matt Palmer wrote:


> On Thu, Sep 22, 2005 at 06:15:00AM -0000, Srinivasan S wrote:
>
>
> > Question:  How do I get X to run in the guest operating systems  
> > ie. Suse
> > or Ubuntu ?
> I don't really think you can, at least not directly.  The problem  
> is that
> the X server typically wants direct access to the video hardware,  
> and the
> domU guest isn't allowed near it.  Short of making your dom0 serial- 
> console
> only, I don't think you could do it.
>
> I vaguely recall something about a framebuffer device appearing in  
> Xen 3,
> which you could point the X session in your domU at, but I could be
> completely off-the-mark.
>
> A way (not the only one, though) to get full X sessions happening  
> is to
> install an appropriate X server in your dom0, configure the domU to  
> expose
> it's display manager via XDMCP over the network (you can restrict  
> who can
> connect, for security), and then run something like
>
> X -query <domU IP address>
>
> in the dom0.  Make it an init script if you want.  That should  
> start the X
> server in the dom0, and then connect it to the display manager on  
> the domU,
> which should produce a nice GUI login screen.
>
> Note that things probably won't run as well as they would normally,  
> and 3D
> accelerated graphics almost certainly won't work.
>
> - Matt
>
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