Windows 10 GPU Passthrough Bootloop

Kalyan Sriram

New Member
Oct 17, 2019
Hi, I just installed Windows 10 on a virtual machine on my home workstation running proxmox. It worked fine, so I proceeded to setup GPU passthrough. I am running an AMD Ryzen 2700X processor with a GTX 1080. GPU passthrough worked, and I was able to get a desktop setup. Next, I proceeded to download and install the latest NVIDIA drivers for my card. However, half way through the installation, my monitor went blank - I waited, but then the monitor lost signal and Windows restarted. Unfortunately, it then got stuck in a bootloop - it would show the Windows progress bar but then keep rebooting. After a few cycles, it launched the repair utility - but the automatic repair tool was unable to "fix" the machine. I then went into Proxmox configuration and removed the hostpci0 entry. The system then booted fine (although with VNC not passthrough). When I switched back to passthrough, the bootloop resumed. I then reinstalled windows from scratch, but a few minutes later, I was back in the same boat! What am I doing wrong? I installed Windows correctly (to my knowledge) including the VirtIO drivers. Any help would be appreciated!

Update: I was able to succesfully install Ubuntu 18.04 Desktop + NVIDIA drivers for linux succesfully (lspci shows nvidia driver being used) - this shows that the GPU isn't faulty. Windows still isn't working.
Last edited:
can you post the vm config (when it was configured for windows) ?


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