<![CDATA[Dual video adapters - what should I see, and where?]]>xcp-ng 8.3 on a Dell R810 w/ Geforce GT730 four port HDMI adapter set up as PCI passthrough. Card has been isolated from Dom0.

Several VMs - one Win11 Pro; others are various Linux Mint versions.

Let's start with the Windows VM. I installed the appropriate NVidia drivers and connected up a few monitors to the card. Device Manager shows the driver as initialized and running.

Initially I accessed the VM from the Xen Orchestra Console and went to Display Settings to check for the presence of multiple displays. Nada - the only one showing was the server's built-in VGA adapter.

I then pressed "Detect other displays" and locked the VM up. Reboots show a black screen in the Console (hadn't checked the HDMI monitors yet; server is remote).

What SHOULD I be seeing here - all the displays listed or just the Console's video device?

I'll touch on the Linux stuff later in thread.

]]>https://xcp-ng.org/forum/topic/12327/dual-video-adapters-what-should-i-see-and-whereRSS for NodeMon, 29 Jun 2026 17:10:10 GMTMon, 29 Jun 2026 14:57:53 GMT60<![CDATA[Reply to Dual video adapters - what should I see, and where? on Mon, 29 Jun 2026 17:06:34 GMT]]>@acebmxer Certainly did - and got it working in my Windows guest...somewhat. When that VM initializes, all four monitors are activated by the graphics card, and I can log into the VM via an XOA-connected laptop. Can set up the monitors too. But...can only get mouse/keyboard focus on the main display (which I suspect is due to the way XOA Console handles things). So now I have to figure out a way to pass the keyboard and mouse through to the VMs.

The Linux issue I suspect is due to driver signing requirements but at least this part works. There will be two 4-port video cards in the system - one for each VM that's assigned a pass-through device.

]]>https://xcp-ng.org/forum/post/106506https://xcp-ng.org/forum/post/106506Mon, 29 Jun 2026 17:06:34 GMT<![CDATA[Reply to Dual video adapters - what should I see, and where? on Mon, 29 Jun 2026 15:18:58 GMT]]>@FredM273

Did you enable PCI-Pass through for the nvida card? If so did you then add the pci card to the vm? the gpu can only be utilized by 1 vm at a time fyi.

https://docs.xcp-ng.org/compute/

]]>https://xcp-ng.org/forum/post/106504https://xcp-ng.org/forum/post/106504Mon, 29 Jun 2026 15:18:58 GMT