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Proxmox HDMI output for one VM-container
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this post was submitted on 31 Jul 2023
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It's important to note that you will need 2 GPUs ( 2 PCIE or 1 integrated and 1 PCIE). One GPU is needed for Proxmox and the other can be passed through to the VM.
If you are running a hypervisor, running headless would be perfectly ok with a webui or remote utility like virtmanager. I was making the assumption OP was not doing this on a main rig.
Surprisingly this isnt actually needed. It makes it easier to setup, but isnt required beyond that (and some bios need one plugged in to boot but that won't be an issue).
My current setup is 2 nvidias both passed through to separate VMS, then I just use another PC to access the web console. My ideal setup would be a VM that launches itself when none else are running, to allow a graphical output even with the host headless