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[Xen-devel] VGA passthrough and nvidia optimus

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] VGA passthrough and nvidia optimus
From: Anders Aagaard <aagaande@xxxxxxxxx>
Date: Sun, 31 Jul 2011 15:08:56 +0200
Delivery-date: Sun, 31 Jul 2011 06:10:22 -0700
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Is VGA passthrough with an nvidia optimus laptop remotely feasible? For those who don't know, nvidia optimus is two hardware cards, connected to the same display. One sandy bridge setup (I use the intel driver for this), and one nvidia card. I have a laptop with this setup, and usually I'm using only the intel card. I then use acpi_call to power down the nvidia card.

To use this optimus setup on linux I use bumblebee (https://github.com/MrMEEE/bumblebee) which sets up a separate X server to run the nvidia card. Then use virtualgl to show the image on the current (intel sandy bridge) run X server.

Will it be possible for me to get VGA passthrough running? I can have it running with a separate output (hdmi/vga, hopefully one of them is connected directly to the nvidia card, and doesn't use any hacks with the intel card to work) if it will be needed (and I figure it will, as two cards are here trying to use the same display).

Has anyone looked into this?

Best regards
Weeks of coding can save you hours of planning.
- http://code.google.com/p/aagaande/
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