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Re: [Xen-devel] Re: Unstable + 3.0.0 testing, several issues

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: Unstable + 3.0.0 testing, several issues
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Tue, 2 Aug 2011 07:56:55 +0300
Cc: Liwei <xieliwei@xxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Mon, Aug 01, 2011 at 11:42:57PM -0400, Konrad Rzeszutek Wilk wrote:
> > 
> >     2. Regarding the issue with the system rebooting when a Windows 7
> > HVM (with a videocard in _PCI_ NOT VGA passthrough) reboots, here is
> > the kernel panic that is logged:
> 
> Huh? videocard in _PCI_ NOT VGA.. so what videocard is in PCI?
>

I'm expecting he uses the Xen normal PCI passthru,
and not Xen VGA passthru.

(ie. he doesn't have "gfx_passtru=1" specified).

> > 
> >     4. The ATI VGA (not PCI) passthrough patch isn't working with my
> > HD6850 any more. Not sure when that started since I stopped using it
> > after finding out that normal PCI passthrough works just as well. The
> > qemu log ends with:
> 
> Um, normal PCI passthrough vs not normal passthrough? Can you remind
> me what that is?
> 

"not normal passthru" aka "Xen VGA passthru":
http://wiki.xen.org/xenwiki/XenVGAPassthrough

VGA passthru does all the weird legacy x86 stuff to get text mode, vesa modes, 
vbios, vga memory ranges, etc working in the VM where the graphics card is 
passed thru to.

-- Pasi


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