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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
Dkim-signature: v=1; a=rsa-sha256; c=simple/simple; d=ts.fujitsu.com; i=dietmar.hahn@xxxxxxxxxxxxxx; q=dns/txt; s=s1536b; t=1264602519; x=1296138519; h=from:sender:reply-to:subject:date:message-id:to:cc: mime-version:content-transfer-encoding:content-id: content-description:resent-date:resent-from:resent-sender: resent-to:resent-cc:resent-message-id:in-reply-to: references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:list-owner:list-archive; z=From:=20Dietmar=20Hahn=20<dietmar.hahn@xxxxxxxxxxxxxx> |Subject:=20Re:=20[Xen-devel]=20Qestion=20to=20gfx-passth rough=20to=20HVM=20linux=20domU|Date:=20Wed,=2027=20Jan =202010=2015:28:35=20+0100|Message-Id:=20<201001271528.35 802.dietmar.hahn@xxxxxxxxxxxxxx>|To:=20Pasi=20=3D?iso-885 9-15?q?K=3DE4rkk=3DE4inen?=3D=20<pasik@xxxxxx>|Cc:=20"Tim othy=20J.=20Moore"=20<Timothy.Moore@xxxxxxxxxxx>,=0D=0A =20"xen-devel@xxxxxxxxxxxxxxxxxxx"=20<xen-devel@xxxxxxxxx source.com>|MIME-Version:=201.0 |Content-Transfer-Encoding:=20quoted-printable |In-Reply-To:=20<20100127141259.GL2861@xxxxxxxxxxx> |References:=20<201001271345.41232.dietmar.hahn@xxxxxxxxx u.com>=20<E5E913F540B51B4C997F7A299316873596A56FC190@vmdc 1.w3host.co.uk>=20<20100127141259.GL2861@xxxxxxxxxxx>; bh=NpN31HdiTSeyNb3vgkaPjv1EQ0E74ZDY6E42pUHbVdk=; b=mGQKO4+CeLcRf8TeJAWwjew04Iq1elM7GpcInlP3H884sstbAn4u7G74 qemhjicrFxrrCeIN3uvfbiQC4LCpBIbSKlJExwXUm5KNk5VVjYIV8oEhB LZMqaCbSBJiPOylDB3zDkVQ0AbGTVhSmn1pEc6Xj1jcY9gjmT0uOrjSRV jc6msriEd7EBM7LR0WIaqZ1swuHt6BvtoETLCCx4bJG6xxiN/afEeyWZq MuLkdB9Humyyq9WYlbx2VW/HfDZrr;
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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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