Windows 11 Guest - GPU PCI Passthrough Breaks with Memory Hotplug

[mattreidy]

I've got a Windows 11 guest running with PCI Passthrough for the nVidia GPU in the host and it works great. When I configure the guest with NUMA and Hotplug CPU everything works as it should, but when I also enable hotplug Memory, the GPU no longer passes through to the guest.

Is this to be expected or am I doing something wrong. Guest memory is set to 24576 (24GB) and Ballooning Device is checked.

 

[Moayad]

Hi,

Did you check the dmesg for anything interesting after you enabled the Memory Hotplug?

 

[mattreidy]

I am new to Proxmox and have not checked dmesg. It appears that the Windows guest boots, but it's just headless because the GPU is unavailable.

I'll learn and use dmesg next.