Thanks for all the replies. I do have the extra hardware, but I am right now not able to put both together on the guest (i.e. I have to use -vga none while passing through the nvidia card that I have) because the VGA I am trying to pass through has an option rom and hw/device-assignment.c complains about not having enough option ROM space if both VGAs are included. I should be able to try something out after some fussing in this particular area Thanks Subash -----Original Message----- From: Michael Tokarev [mailto:mjt@xxxxxxxxxx] Sent: Tuesday, June 30, 2009 9:34 AM To: Han, Weidong Cc: 'Avi Kivity'; Subash Kalbarga; 'kvm@xxxxxxxxxxxxxxx' Subject: Re: VGA pass-through Han, Weidong wrote: > Michael Tokarev wrote: >> Han, Weidong wrote: >>> Michael Tokarev wrote: >> [] >>>> But how about using it as a "secondary" video card? Like, I can >>>> plug another add-on vga card into a free PCI slot and tell X to use >>>> that one instead of "default" card. Can kvm work like this? >>> "secondary" means secondary video card in host, and will be >>> "primary" in guest, right? As long as it's primary in guest, I think >>> you still need most of above changes. >> No, I mean "secondary" on guest - no matter if it's secondary or >> primary on host. So that we'll have qemu-emulated VGA as primary and >> a hardware-based secondary on *guest*. > > Oh, for "secondary" in guest, it may needn't above changes. You can try it without any change. I can't: ENOHARDWARE. >> How much useful it is - it's another question. For instance, I've no >> idea how windows guest will be able to use such "secondary" vga card >> on guest. > > I don't know. Is there any interesting usage of this secondary VGA in guest? I *guess* windows can be told to use non-primary display. But I've no idea how. Also, it certainly supports multi-display configuration somehow. Running most stuff on "secondary" should be possible. /mjt -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
