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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Primary VGA Passthrough Status
I can confirm that a HDMI HD audio device does show up on the bus both before and after the modification, but I never tried using it and none of my Nvidia cards have HDMI ports so I am not sure how it works. Gordan On 10/09/2013 06:20 PM, David Erickson wrote: Just found it claims to be supported on the spec list of the 2000 cards, but I am curious if everything still works normally on the converted Quadros. Thanks, David On Wed, Oct 9, 2013 at 9:36 AM, David Erickson <halcyon1981@xxxxxxxxx <mailto:halcyon1981@xxxxxxxxx>> wrote: Thanks Gordan- I took a look, none of the 2000s seem to have native HDMI out. This is actually an important point to me, when you flash from GeForce -> Quadro (or are using a native Quadro like the 2k), is there also a functioning pass through HDMI audio device? And in the case of the Quadro 2000, would I be able to get video and audio out of the displayport and convert it to HDMI? On Wed, Oct 9, 2013 at 1:54 AM, Gordan Bobic <gordan@xxxxxxxxxx <mailto:gordan@xxxxxxxxxx>> wrote: If you are after a low end card, you might as well just buy a genuine Quadro 2000. It's single-slot, powered from the slot (no auxiliary power required), should be ample for a HTPC, and will "just work". And they are cheap enough on ebay that it's not worth trying to cut a corner. On Tue, 8 Oct 2013 17:49:35 -0700, David Erickson <halcyon1981@xxxxxxxxx <mailto:halcyon1981@xxxxxxxxx>> wrote: David or Gordon have you tried this on lower end cards like a GT 640? (Maybe there isn't a Quadro even close to flash it to). These cards are major overkill for a non-gaming HTPC. Thanks! David On Tue, Oct 8, 2013 at 3:22 PM, David TECHER wrote: Gordan is right. In the past patches maintenance for NVIDIA was a real pain. That's the reason why I stopped to maintain those patches in February, 2013. 1) Soft-moding a GTX 480 to a Quadro 6000 aims at unlocking the expected feature on the card http://www.davidgis.fr/blog/__index.php?2013/09/18/969-xen-__430-vga-passthrough-gtx-480-__soft-moded-to-quadro-6000 <http://www.davidgis.fr/blog/index.php?2013/09/18/969-xen-430-vga-passthrough-gtx-480-soft-moded-to-quadro-6000> [2] I tested on two GTX 480 cards and it works very well. Just a bios to edit/update. Check the checksum and updates straps bits 2) Hard-moding a GTX 680 to a 1/2 GRID K2 works very well too. I tested it on a Gigabyte GV-N680OC-2GD...it works like a charm 3) Hard-moding a GTX 670 to a 1/2 GRID K2 works very well too. I tested it on the MSI N670GTX-PM2D2GD5/OC...it works like a charm (just a few resistors to remove) http://www.davidgis.fr/blog/__index.php?2013/10/04/971-xen-__430-vga-passthrough-gtx-670-__msi-n670gtx-pm2d2gd5-__successfully-hard-moded-to-__grid-k2 <http://www.davidgis.fr/blog/index.php?2013/10/04/971-xen-430-vga-passthrough-gtx-670-msi-n670gtx-pm2d2gd5-successfully-hard-moded-to-grid-k2> [3] This card has a similar PCB than Asus card provided/tested on the eevblog forum http://www.eevblog.com/forum/__chat/hacking-nvidia-cards-__into-their-professional-__counterparts/msg217534/#__msg217534 <http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/msg217534/#msg217534> [4] ------------------------- DE : David Erickson À : Gordan Bobic CC : "xen-users@xxxxxxxxxxxxx <mailto:xen-users@xxxxxxxxxxxxx> [7]" ENVOYÉ LE : Mardi 8 octobre 2013 20h56 OBJET : Re: [Xen-users] Primary VGA Passthrough Status On Tue, Oct 8, 2013 at 9:43 AM, Gordan Bobic wrote: On Tue, 8 Oct 2013 09:20:51 -0700, David Erickson wrote: On Tue, Oct 8, 2013 at 5:42 AM, Gordan Bobic wrote: On Tue, 8 Oct 2013 00:04:33 -0700, David Erickson wrote: On Mon, Oct 7, 2013 at 11:29 PM, Gordan Bobic wrote: On 10/07/2013 09:33 PM, David Erickson wrote: Hi All- Is it possible yet to pass through a ATI or Nvidia GPU as the primary VGA card to a Win 7/8 VM, and have it fully functional there (DXVA etc), Why exactly do you need the card to be primary in domU? IME this doesn't gain you anything other than being able to see the BIOS splash screen and boot animation on the external monitor (which in itself isn't worth the extra effort). Primarily it is for htpc functionality like Blu-ray playback software and Digital Cablecard based playback using devices like a HDHR Prime. I believe the code that tests for playready (or equivalent) compatibility always looks at the primary video card and finds it totally missing any of these features and refuses to play back properly. I need to verify that having a passed through card as the primary actually solves these issues, but I think it is a reasonable hunch (unless anyone else has already tried this and proved it wrong). I never used it so cannot comment on it. David Techer maintains a patch set for Nvidia cards that include primary passthrough support. The one in particular you will need is the one that gives the VBIOS loading supprot in domU. Between that and a GTX480 modified to a Quadro 6000 (VBIOS editing required) you _might_ just be able to get it to work. I never tried primary passthrough since secondary passthrough has always worked for all of my requirements. without crashing the guest or the host during operation or when resetting the guest? It works fine with Nvidia Quadro cards (real or modified GeForce), provided your hardware works properly (e.g. no dodgy PCI bridges (such as Nvidia NF200) bypassing the IOMMU). The latter is, it turns out, quite rare - an awful lot of hardware seems to have IOMMU support broken to some extent. Is there something special in the bios/firmware that is enabled when converting these to Quadros? You have to modify the strap bits. This can be done with a BIOS edit on cards up to GTX480, or with some soldering on a GTX680 (you will need good eyes, steady hands, high quality soldering paste and some pro grade soldering kit (hot air or oven - you might be able to get away with a really tiny soldering tip, but bear in mind that you will be looking at soldering both ends of a resistor that is 1mm long, without shorting it out). If you want the easy option, go for a GTX480 and BIOS mod it (or a GTX470 -> Quadro 5000 or a GTS450 (make sure you get a 1GB GDDR5 one) -> Quadro 2000 I have used all of the above extensively without any issues). Thanks Gordon, I probably wasn't clear in my question, but when you convert it from a standard Geforce => Quadro, what is changing at the card level to make it more compatible with PCI Passthrough and Xen? GeForce drivers don't implement support for various quirks and side-effects of running in a VM. Quadro drivers do. You change the PCI ID of the card by modifying the straps. That makes the card get detected as a Quadro rather than a GeForce, and the Quadro driver deals with the quirkyness and side-effects of running in a VM (e.g. the fact that the physical BARs differ from the virtual BARs). The hardware between the GeForce and the Quadro is by and large the same. The reason for the modification is to convince the Quadro driver the card really is a Quadro and that you paid an extra pile of cash for the privilege of running it in VGA passthrough. Is it some feature of the new firmware that is being flashed to the card? No, it's a hack to facilitate the use a driver that can handle running in a VM. And do Geforce cards just absolutely not work at all prior to being converted to Quadros? GeForce cards absolutely do not work with VGA passthrough without modifications; at least not without an additional, unsupported patch set which doesn't work for recent cards (4xx cards work, not sure about the more recent ones), recent drivers (more recent than 275.xx), and recent OS-es (more recent than XP). And unless your time really is worthless, getting a GeForce 4xx series card and modifying it once with no other side effects is a lot less effort than maintaining your own build of Xen packages with the extra patches, even if they do work for your specific use-case. Thanks that made it very clear, and I totally agree on the time point. _________________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxx> [11] http://lists.xen.org/xen-users [12] Links: ------ [1] mailto:davidtecher@xxxxxxxx <mailto:davidtecher@xxxxxxxx> [2] http://www.davidgis.fr/blog/__index.php?2013/09/18/969-xen-__430-vga-passthrough-gtx-480-__soft-moded-to-quadro-6000 <http://www.davidgis.fr/blog/index.php?2013/09/18/969-xen-430-vga-passthrough-gtx-480-soft-moded-to-quadro-6000> [3] http://www.davidgis.fr/blog/__index.php?2013/10/04/971-xen-__430-vga-passthrough-gtx-670-__msi-n670gtx-pm2d2gd5-__successfully-hard-moded-to-__grid-k2 <http://www.davidgis.fr/blog/index.php?2013/10/04/971-xen-430-vga-passthrough-gtx-670-msi-n670gtx-pm2d2gd5-successfully-hard-moded-to-grid-k2> [4] http://www.eevblog.com/forum/__chat/hacking-nvidia-cards-__into-their-professional-__counterparts/msg217534/#__msg217534 <http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/msg217534/#msg217534> [5] mailto:halcyon1981@xxxxxxxxx <mailto:halcyon1981@xxxxxxxxx> [6] mailto:gordan@xxxxxxxxxx <mailto:gordan@xxxxxxxxxx> [7] mailto:xen-users@xxxxxxxxxxxxx <mailto:xen-users@xxxxxxxxxxxxx> [8] mailto:xen-users@xxxxxxxxxxxxx <mailto:xen-users@xxxxxxxxxxxxx> [9] mailto:gordan@xxxxxxxxxx <mailto:gordan@xxxxxxxxxx> [10] mailto:halcyon1981@xxxxxxxxx <mailto:halcyon1981@xxxxxxxxx> [11] mailto:Xen-users@xxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxx> [12] http://lists.xen.org/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxx http://lists.xen.org/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxx http://lists.xen.org/xen-users
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