Re: VGA passthrough of GTX 660 to KVM guest

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On Wed, 2013-08-28 at 19:42 +0200, Gustav Sorenson wrote:
> Hello,
> 
> yes, 1:00.0 is the GTX 660, and yes, I'm running X on the host.
> When I boot into runlevel 1 (on Mint, which is Debian-based, so that
> corresponds to a single-user runlevel without X, although I saw a
> not-very-fancy boot splashscreen), this is what dmesg | grep -i vga
> gives me:
> 
> [    0.000000] Console: colour VGA+ 80x25
> [    0.324894] vgaarb: device added:
> PCI:0000:00:01.0,decodes=io+mem,owns=io+mem,locks=none
> [    0.324903] vgaarb: device added:
> PCI:0000:01:00.0,decodes=io+mem,owns=none,locks=none
> [    0.324905] vgaarb: loaded
> [    0.324906] vgaarb: bridge control possible 0000:01:00.0
> [    0.324907] vgaarb: no bridge control possible 0000:00:01.0
> [   16.459085] hda-intel 0000:01:00.1: Handle VGA-switcheroo audio client

Ok, so it's probably X.  You might be able to start your guest from here
and get VGA through the gtx660 (assuming nothing else is broken with
radeon VGA arbiter support).  You could also run startx to confirm that
it's X doing all those VGA arbiter writes.  Thanks,

Alex

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