Kenishi

Yes, had the same behaviour with my second card - which always worked. Quickly going to sleep mode and booting up again solves it. So happy it's finally working. Thank you so much!

You are a genius! You my dear friend are my hero. I owe you so much! Send me your mail address by PM and I'll send you an Amazon voucher or anything else you use to buy online. Starting only one VM with both GPUs worked. Then I stopped the VM, assigned one gpu to another VM and started again. And BAM it worked! I'll write a start script which does that with an "empty VM" automatically, so I don't have to do it myself.

I did already try the second solution - it's how I dumped my GPU ROM and edited the XML manually. About the binding/unbinding solution - well, I tried it but failed. echo "0000:0a:00.0" > /sys/bus/pci/devices/0000:0a:00.0/driver/unbind shows "No such file or directory". Also tried it on "/sys/bus/pci/drivers" but there it says "No such device". (0a:00.0 is my primary GPU on PCIe slot 1) I slowly begin to give up. I'm on latest unRAID 6.4.0-rc14. Set it up today from scratch.

You're exactly right. Both are exactly the same GPU model. Yes, I tried switching them already. The primary GPU (which is in PCIe 1) doesn't work. Doesn't matter which of the two is in there. The one in the second slot works fine. Sadly I can't use slot 3 because there's not enough space for the GPU. There are cables right underneath of the slot and the GPU is too big. That's what I think as well. The card gets initialized by unraid console and then can't be passed to the VM. I wonder if it's possible to run unraid without it initializing the primary GPU. UEFI is disabled (by default) on the bios. I looked into the settings and it's still deactivated - so no UEFI => I think UEFI is still used even if disabled. Tbh, I'm not quite sure about this.

@pederm That's why it's working for you I think. You're not using your primary GPU for the VM. And that's exactly what I try to achieve - using my primary GPU for the VM. Do you know if it's possible to use three GPUs with the X370-PRO?

@pederm: Thanks a lot for sharing your setup. Really appreciate it and will try updating my BIOS and the settings right now. Some questions while I'm trying it out: - Do you have a second GPU? - Is the Nvidia 1050Ti your primary GPU? - If so, does your screen with the terminal on it goes black and then shows the Windows 10 VM? @gelmi: My PC specs: - Mainboard: Asus Prime x370 PRO (BIOS Version 0902 <= most stable on my system) - CPU: Ryzen 7 1700X - GPU 1: NVIDIA GeForce GTX 1080 TI (PCIE 1) <= Two monitors connected - GPU 2: NVIDIA GeForce GTX 1080 TI (PCIe 2) <= One monitor connected - RAM: Corsair Vengeance LPX 64GB (4 x 16GB) DDR4-3000 Yes, I already did dump my GPU ROM, using the commands on unRaid as well as in Windows using CPU-Z. Wrote it into the XML file. No luck yet. My second graphics card on PCIe 2 works. But the primary one, on PCIe 1, won't work at all. I see the terminal on my screen. As soon as I start the VM, the screen with the terminal goes black and that's it... Really appreciate your help and all your hints!

Thanks a lot for your answer. The differences I had was * BIOS was set to: OVMF * Machine was set to: i440fx-2.7 I created a new machine with your settings but got the same problem. As soon as I start the VM, my screen goes black and nothing come up. You only have one GPU, right? Do you also see the Linux terminal on the screen and when you boot up the VM, the same screen goes black and then shows the VM content after that? I wonder why it's working for you with almost the same setup as I have. Something must be different on my side which prevents the graphics card to function correctly. When I connect to the Windows VM using a remote connection, I see my graphics card in the device manager but with a warning sign. "The device doesn't work properly." So it somehow recognise it, but it doesn't work as it should.

Wow, that was a fast answer, thanks a lot. Really appreciate it! I'm trying to use Windows 10. Tried installing Ubuntu and opensuse as well, but run into the same issue. Did it work for you without any special changes in the settings, syslinux configuration or xml of the VM?

@gelmi How were you able to solve it? I use a Ryzen and the Asus X370 Pro as well. The only difference is my GPU: NVidia GTX 1080Ti When I start the VM I get a black screen on my primary GPU (unRaif 6.4.0-rc). Would appreciate if you could let me know how you solved it.