Re: [Xen-devel] Qestion to gfx-passthrough to HVM linux domU

To:	Pasi Kärkkäinen <pasik@xxxxxx>
Subject:	Re: [Xen-devel] Qestion to gfx-passthrough to HVM linux domU
From:	Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
Date:	Wed, 27 Jan 2010 15:28:35 +0100
Cc:	"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Timothy J. Moore" <Timothy.Moore@xxxxxxxxxxx>
Delivery-date:	Wed, 27 Jan 2010 06:28:56 -0800
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Am 27.01.2010 schrieb Pasi Kärkkäinen:
> On Wed, Jan 27, 2010 at 01:35:18PM +0000, Timothy J. Moore wrote:
> > Hi Dietmar,
> > 
> > Your card does not support FLR, but it should still work - the 1 time and 
> > then Dom0 will need rebooting to reset the VGA card.
> > 
> 
> Is there really no way to reset the card besides FLR? How does Xen Client do 
> this? 

I already downloaded this source and I'll have a look.
Dietmar.

> 
> > Sometimes TEXTMODE on the VGA does not work, then kdm loads with VGA mode 
> > and you see DomU gfx. Ok! Try creating a Serial port in DomU and using 
> > minicom etc in Dom0 (or via SSH to Dom0) and debug via the Serial port.
> > 
> > Which patches did you apply?
> > 
> 
> That would be good to know aswell.
> 
> -- Pasi
> 
> > Tim
> > 
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> > [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Dietmar Hahn
> > Sent: 27 January 2010 12:46
> > To: xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-devel] Qestion to gfx-passthrough to HVM linux domU
> > 
> > Hi list,
> > 
> > I try to get gfx-passthrough on a laptop. I inserted some patches from
> > Weidong Han and I'am able to passthrough the primary card (the only gfx
> > card) to the domU (Linux HVM). To connect to the domU I use the serial 
> > console.
> > I boot the domU but can't see the boot loader (grub) screen.
> > Later the kernel messages are printed (not on every boot!).
> > I can start X11 on the console (with the passthroughed card) and see the
> > kdm screen on the console.
> > If I read the vga-bios from /dev/mem within the domU it's the same as
> > in dom0.
> > My questions:
> > Where to search for the missing boot console messages?
> > Has this to do with the FLR?
> > How can I debug this?
> > 
> > gfx: VGA compatible controller: nVidia Corporation G96M [Quadro FX 770M]
> > 
> > Thanks.
> > 
> > Dietmar.
> > 
> 
> 
-- 
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Re: [Xen-devel] Qestion to gfx-passthrough to HVM linux domU