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Re: [Xen-devel] How can I add a non standard VGA mode in Xen 4.3

On Fri, Apr 12, 2013 at 05:47:18PM +0200, Fabian Köslin wrote:
> Hello everybody,
> I have a Windows 7 HVM domU running on a Debian dom0. I use SDL to connect to 
> the domU and I need support for a non standard VGA mode. Previously in Xen 
> 4.2.1 I edited the source file: 
> tools/firmware/vgabios/vbetables-gen.c 
> I simply added the vgamode I need and compile Xen. This worked perfectly 
> since I try Xen 4.3-unstable.

So with Xen 4.2 you probably used qemu-dm (qemu traditional)..
What "non-standard" modes are you adding? 

>  I found out that Xen 4.3 uses a new bios, which seems to provide his own 
> vgabios. In the source file: 
> tools/firmware/seabios-dir/vgasrc/bochsvga.c 
> are modes defined. But if I add or even only change a modes the changes 
> doesn't appear in the domU. Of course I compiled and reinstalled Xen after 
> applying the changes. 

Yeah, and Xen 4.3 defaults to using qemu-upstream as a default, 
so it's quite different from the old qemu-dm.

Note that you can still make Xen 4.3 use the old qemu-dm aswell.

> Can anybody give me a hint where I can add a new mode in Xen 4.3?

Sorry, I'm not aware of how to do that with 4.3 ..

-- Pasi

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