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Re: [Xen-users] Video output/graphics in virtualized OSs

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Subject: Re: [Xen-users] Video output/graphics in virtualized OSs
From: Ernst Bachmann <e.bachmann@xxxxxxxx>
Date: Sun, 13 Nov 2005 16:18:48 +0100
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On Saturday 12 November 2005 21:42, Curtis Shipley wrote:
> How do the virtualized operating systems in XEN output video? I presume
> at this point, it isn't completely transparent - where they are writing
> to what they consider to be video memory and the display of that virtual
> buffer is somehow managed by Dom0. If that's the case, then how at this
> point is it handled? Specialized X Servers?

Well, the answer is: It depends.

For example, dom0 (yes, thats a virtualized OS, too) simply accesses your VGA.
domUs are textmode only as far as xen is concerned, they only got a virtual 
terminal device. 
But since you have networking between them, you can use the standard unix 
stuff to get graphical apps working in domU, like X11, VNC, NX, ...

Now if you were asking about unmodified guests running with help of the next 
generation AMD/Intel CPUs, I think they'll have a emulated SVGA card.


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