From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordan Bobic Subject: Re: Xen VGA Passthrough - GTX 680 successfully hard-moded to GRID K2 Date: Mon, 23 Sep 2013 19:53:12 +0100 Message-ID: <52408E18.5040702@bobich.net> References: <1379957311.87960.YahooMailNeo@web172003.mail.ir2.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1379957311.87960.YahooMailNeo@web172003.mail.ir2.yahoo.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: "xen-devel@lists.xen.org" Cc: "xen-users@lists.xen.org" List-Id: xen-devel@lists.xenproject.org On 09/23/2013 06:28 PM, David TECHER wrote: > Hi Gordan, > > I wanted to let you know that today I decided to have a try for my GTX > 680. Gigabite GTX 680 2048 MB GDDR5. > > I know that this particular card could be hard-moded to GRID K2 so VGA > passthrough could work. FYI, GTX680 modified to a K5000 also works fine for VGA passthrough. I haven't noticed any difference in the functionality. > Following instructions found on > http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/420/ > I just removed two resistors. Just out of interest - are your video outputs working correctly? Can you get DL-DVI output or DP output without problems? I find that on bare metal, it works fine, but in a Xen VM, SL-DVI works, but DL-DVI doesn't. DP also works on bare metal, but doesn't work at all domU. As far as I can tell, nobody has had the same issue before. Then again, AFAIK, nobody else is running this setup with an XP64 domU, which is why I am particularly interested to hear if you are seeing the same issue (you mentioned you also run XP64). > I did the test on another VM (Windows 7 64 bits). I was able to play > games, shutdown the VM, restart the VM without restarting the dom0. > > I am very impressed. Restarting domU (Linux or Windows) without > restarting the dom0 is very impressive. Indeed. As I have mentioned a number of times before, a faux-Quadro setup is far, far superior to an ATI setup when it comes to VGA passthrough. And I wouldn't say it's impressive per se - it is normal and expected. OTOH, having to reboot dom0 when rebooting domU is utterly broken and unfit for purpose. Gordan