This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] nographic=1 but still have a vga adapter

To: "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx>
Subject: RE: [Xen-devel] nographic=1 but still have a vga adapter
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Sun, 5 Jul 2009 12:25:28 +1000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Trolle Selander <trolle.selander@xxxxxxxxx>
Delivery-date: Sat, 04 Jul 2009 19:26:17 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <8686c3cd0907041246s61756236tfaaa122f684332b5@xxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <AEC6C66638C05B468B556EA548C1A77D016DDAF5@trantor> <515922b50907031006o5fc2c689lf7fa7142f2509fdb@xxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D016DDAF9@trantor> <8686c3cd0907041246s61756236tfaaa122f684332b5@xxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acn84Dur7v0rf1uESBq0U54hxrye0gAN1TzA
Thread-topic: [Xen-devel] nographic=1 but still have a vga adapter
> James,
> I tent to believe that it's the driver in Windows that prevents the
> from entering stand-by, since if you'll try the same on a Linux guest,
it will
> go to stand-by without any problems.

A Linux HVM guest? I had assumed it was probably the driver but thanks
for the confirmation.

> Regarding the problem you have, there are 2 options to solve it:
> 1. Use VGA pass-through with IOMMU (should work on some of the devices
> Xen 3.4, and a compatible machine)
> (However, i have tried it, and it didn't work on my machine...)

Unlikely to work on my test machine - it's a bit old.

> 2. Write your own basic wrapper driver for the display adapter, which
> support sleep. Maybe you will be able to find such driver out in the

I have been looking for a dummy display driver (eg which windows thinks
is a display but isn't really) and I was sure I'd find something but not
so far...



Xen-devel mailing list