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Clarify in documentation if Nested Virtualization Extensions and Discrete Device Assignment (DDA) for VGA Passthrough are compatible? #720

Open nkrepo opened 6 years ago

nkrepo commented 6 years ago

Can the Nested Virtualization Extensions and Discrete Device Assignment (DDA) for VGA Passthrough concurrently enabled for one Hyper-V Generation-2 VM in Windows Server 2016 for a Windows 10 Guest VM?

Every time I try to enable nested virtualization extensions for a VM that already uses DDA for VGA passthrough I get a BSOD or an endless boot loop.

Official Documentation: Plan for Deploying Devices using Discrete Device Assignment Deploy graphics devices using Discrete Device Assignment Run Hyper-V in a Virtual Machine with Nested Virtualization

Details for the issue are provided in: https://social.technet.microsoft.com/Forums/windowsserver/en-US/b4831bb8-7709-487c-8d2c-1139fcc16aec/vga-passthrough-with-dda-fails-when-nested-virtualization-extensions-are-enabled-in-windows-server?forum=winserverhyperv#371e8e60-c408-4158-b6c4-9eb4b898b0e2

Marietto2008 commented 4 years ago

very good. I see that they care so much about this topic.

Herrick19 commented 3 years ago

Hi,

I came here because I have the exact same problem. DDA works Well for me. Nested Virtualization also works well. As soon I enable both on the same VM at the same time either the GPU will not work, or the machine blue screen and is stuck in a reboot loop.

I am using:

Did anything actually confirmed if it's supposed to work or not ?

Thanks in advance

Marietto2008 commented 3 years ago

which kind of motherboard do u have ?

Herrick19 commented 3 years ago

Hi,

We are using a Dell Server (Poweredge R720)

Regards

Marietto2008 commented 3 years ago

so,you have more chances than me to make it work,because I tried with a consumer mb,like the aorus pro and a consumer cpu (I9-9900k).

Marietto2008 commented 3 years ago

and I have also the nvidia RTX 2080 ti. so I have 0 chances :D

Herrick19 commented 3 years ago

On My side, I can confirm it Doesn’t work, but this is an old Enterprise Grade GPU (4 GPU on a card) that is no more supported by Nvidia so I thought it could be a problem with the driver or something…

This is why I am wondering if it’s supposed to work or not.

I may end up opening a paid support case with Microsoft to know. If I end up there, I’ll post result to let you know

robinharwood commented 1 week ago

We hugely appreciate your contribution, feedback, and support to our technical documentation.

We’ve phased out GitHub Issues on this repository as the feedback mechanism for content and have replaced it with a new feedback system. For more information see, Content User Feedback. As part of this rollout, we are migrating your issue where our team will use your comments to improve the documentation experience. Unfortunately, this does mean you won't be able to access this issue after the migration is complete.

All issues will be migrated by Thursday 29th August 2024.

Once again, thank you for your valuable feedback, we hope you’ll continue to contribute using our new feedback system.