Re: [Xen-devel] RE: [Xen-tools] xen doesn't support "Framebuffer consolesupport"properly

[Mathieu Ropert <mro@xxxxxxxxxx>]

Basically, *any* screen output require access to video memory :)
However, Xen offer a virtual console facility to domU so they can output 
things, but it's a text-only console (although they are some projects of 
providing a virtual framebuffer support).
Dom0 has direct access to video memory so it shouldn't be a problem to 
use framebuffer on it.
Mathieu

Robert Mortimer wrote:

> Is this a DomU or a Dom0 kernel?
>
> > From my scant understanding the following is true:-
> only Dom0 gets to see the true hardware still runs above the hypervisor
>
> If frambuffer mode requires direct access to hardware then it may not work.
> I am not positive but does frambuffer involves direct writing to video
> memory
>
> DomU gets to see idealized Xen hardware and presumably uses some sort of Xen
> video driver.
>
> DomU does no direct rendering to screen instead it uses VNC
>
> I may however be so so wrong as I am a bit new to this
>
> Robert
>
>  
>
> > -----Original Message-----
> >
> > When I turn on the "Framebuffer console support" in compiling kernel,
> > after system startup, the console doesn't work properly and the kernel
> > parameter( for example: vga=719) doesn't do any effect on kernel.
> >
> > who can help me ?
> > thanks in advance!
> > Andrew Liu
> >
> >
> >
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> > Xen-tools@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-tools
> >
> >    
>
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