Hardware Transcoding stopped working after a GPU swap - though nvidia-smi see's it

Server Version#: v1.28.0.5999-97678ded3 - Ubuntu PC x86_64 - build: linux-x86_64 debian
Player Version#: 1.49.1 Windows Plex App

Hey guy’s I’m having a real tough time with GPU HW encoding today.

My setup is Proxmox → Ubuntu VM → Plex with GPU passthrough.

Originally I had a GTX 1050 passed through, and it was recognized with nvidia-smi without issues in the VM and I was able to take advantage of it for HW transcoding. I recently upgraded one of the gaming rigs in the house, and so I had a RTX 3050 just laying around and figured I would pop it into the server and use it for transcoding because why not ha.

I have verified that the RTX 3050 is passed through correctly and visible within nvidia-smi and /dev/dri/renderD128 is present. When I installed the card I went and sudo apt update' sudo apt upgrade; and it grabbed me some new drivers.

Can anyone help me diagnose why Plex is not able to take advantage of it?

on the web-player i get the error s1003 (Network).

In the Plex Media Server.log I only get WARN’s about transcode without an ID

Aug 07, 2022 21:09:11.546 [0x7fc3e63b9b38] WARN - [Req#947/Transcode] Got a transcode session ping without a valid session ID. Aug 07, 2022 21:09:17.584 [0x7fc3e63b9b38] WARN - [Req#958] Could not convert "state" ("error") to the correct type Aug 07, 2022 21:09:21.542 [0x7fc3e63b9b38] WARN - [Req#948] Could not convert "state" ("error") to the correct type Aug 07, 2022 21:09:31.546 [0x7fc3e6396b38] WARN - [Req#95b] Could not convert "state" ("error") to the correct type

Any help is greatly appreciated! I can provide any other logs if needed, just point me to where I should be getting them from!

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