tsawind

This is a link to a space invader video talking about your original problem. From what I understand, NVIDIA has something in their bios to make their gaming video cards become resistant to virtualization or something. When it is the first slot, it need a custom virtual BIOS .ROM file which fixes this or something. I hope I solved your original issue with this response, maybe someone else will read this and give a better explanation!

Okay well after a couple of hours of sleep, I have made some progress. I enabled syslog to save to flash, and I believe what has been happening is that when the old VM would start up it was using probably old usb pass-through and other wrong things in the xml. I have the second gpu VM operating, currently working to get a display out of the main (1st slot) gpu. Boom, Success!!! A New VM and using a custom hacked Graphics ROM Bios. ROM file for the GPU, now the "handoff" is working!

Correct, hard freeze. I understand that the gpu that unraid is showing up on is supposed to be "handed off" to the VM. unRAID becomes inaccessible from the network as well, so yes a hard freeze.

Hard freeze when trying to click the button to pass through the gpus and restart... Have to pull the USB drive again and delete /config/vfio-pci.cfg just to access the server again.

So I have been working on this problem for hours. I have an Asus Crosshair Hero VII (wifi) with a 2700x and bios #2008. I ran two 1070ti and used 2 windows 10 vms for over 2 years daily (2 gamers 1 cpu) Well I just got a new cpu, 3950x, and I had to update my bios, so I now have 4603. Now both GPU have identical pcie ID names and virtually everything I try ends up crashing unRAID, I have even corrupted my usb a couple times. They are in different IOMMU. I have been able to get ONE of the cards to pass through to a VM, but if I try to start the second one the system hard crashes. I will continue searching for a way to get my daily system up and running, I really hate to have to roll back bios and go back to an 8 core cpu.

I have been using unRAID as my daily driver, and only computer, for about 14 months now. Getting my windows 10 VM to recognize this SMT just gained me like 25% performance, and fixed my microstutter problem in games!

So after reading into this, and researching more, it seems like if we just wait, for possible integration in unRAID 6.9, or just pick a unRAID version that has a linux kernel version of 5.4ish, this will fix the Error 127 bug. This all seems to revolve around the newest generation AMD cpus, and the newer BIOS having conflicts with older linux kernel. In my particular situation, I have an Asus Crosshair Hero VII (WiFi) x470 motherboard. I can't update past Version 2008 (2019/03/14) without getting the 127 bug, and according to this article: https://www.asus.com/News/EtaH71Hbjuio1arV I need at least BIOS version 2302 to use ryzen 3k cpus. I believe that running some of the RC version of unRAID would fix this issue. I.E. unRAID version 6.8.0-RC1 has linux kernel 5.4

Which version of unraid are you using? You arent using any special kernel? I am unfamiliar with unraid legacy mode.

I was REALLY hoping that unRAID 6.8 would fix this issue. I have been running version 6.6.6 for almost a year as a daily driver with two windows VMs on a 2700x, with two 1070 ti, I have a ASUS Crosshair Hero VII (WiFi). The latest BIOS that works without the error 127 bug is version 2008, I just upgraded to unRAID 6.8 without issues. I tried to update to the newest BIOS which is version 2901, ASUS website seems to state that it has AGESA version 1.0.0.3. This has failed GPU passthrough. Going to either revert BIOS back to version 2008, or try to learn how to do this kernel hack. EDIT: I will just bios flashback and wait to see hopefully this kernel update for the stable unraid 5.8. I don't want to learn how to roll-back unraid to a RC version. Thanks for all the hard work!!!

Thanks, I will do that, I am writing down notes and my "append vfio-pci.ids=1912:0014,1022:145f,10ec:b822,1022:1457 isolcpus=1-7,9-15 pcie_acs_override=downstream,multifunction initrd=/bzroot" settings as well. I do have my UUID for the VMs saved as well, Thank you!

Hello, I am using unRAID as our daily driver! This is the only computer we have, and it is setup so that when we turn it on, it auto-starts two VMs running retail Windows 10 Pro. Both VMs have their own usb controllers and their own NVIDIA 1070 ti, running multiple 4k/60 screens. A full hardware breakdown is here: https://pcpartpicker.com/list/LVhGPn I'm about to attempt an upgrade from unRAID version 6.6.6 to unRAID version 6.8. I am going to try to make full backups of all my settings and figure out how to easily roll-back to my stable version if it breaks. After I successfully upgrade unRAID 🤞, I am going to attempt a BIOS update from ASUS ROG CROSSHAIR VII HERO (WI-FI) Version 2008 (2019/03/14) to Version 2901 (2019/11/08) 🤞 The last time I tried to update BIOS I could not get past version 2008 without breaking the GPU hardware passthrough "Unknown PCI header type 127". I lucky have a bios-flashback button, and a USB stick to roll-back. This is in preparation for a cpu upgrade to the 16-core 3950x. I will reply to this thread with the results, please let me know if there are certain things I should try, I have lots of time on my hands. Thank, TsA!

So I have added backgrounds on the bare metal boot-up... started the server up again and now windows is activated on both boot-ups. Very odd indeed, anyways it is working!! YaY!!

Work in progress, mobile all in one gaming/entertainment center. Main 4k gaming station with 3 28" surround monitors all wired Logitech gear, and full surround sound. Secondary 4k gaming rig with 1 4k monitor, and mirrored image to 4k living room and bedroom TVs. all wireless Logitech gear. Expandable NAS with unRAID PRO using 8tb WD drives with parity protection. Motherboard has onboard wifi with external antenna, able to cast 4k movies through walls over long distances. unRAID array has USB backup drives disconnected from the network. Still building and working out compatibility issues here is a pcparts list: https://pcpartpicker.com/list/WBV6ZR

I have attempted to dual boot my computer setup. I Spent an hour on the phone to get microsoft to fix my product key, I think I activated it once on a VM.... Anyways I have a 500gb SSD that is passed through unraid for my windows 10 pro. I booted my system directly from the drive "bare metal" and activated windows, i took the UUID from cmd on my bare metal with --- wmic csproduct get UUID Then I copy/pasted this into the XML for my windows 10 VM using the same SSD being passed through as a SATA drive. Windows is not activated in the VM, I am hesitant to try to enter my product key while in the VM.| What do I do?

Keep in mind I didn't realize that I was overclocking my memory! This is what made my instability so hard to diagnose. Especially with my motherboard on the Asus website showing pictures of 4 sticks of ram running at 3600 mhz!!!! So I bought 3600mhz Ram, thinking I was doing the right thing, but my memory controller wasn't fast enough to keep up, so I was overclocked even though I was running with the recommended XMP profile! The wikichip.org shows the ratings for my integrated memory controller for my 2700x. Also something to note, if I run a bare metal boot-up with windows 10 from an SSD, I am perfectly stable with the overclock.