Cannot get hardware transcoding working with Ubuntu 22 and PMS Docker on NUC 12 Pro

Plex Media Server
,
1

I previously had Plex running my Synology NAS (via Docker) with HW transcoding working well. It has been years since I originally set this up and don’t recall if I ran into challenges around transcoding. Lately the NAS has been bogged down from other containers and I decided to dedicate a system just to be a server and let the NAS do NAS things.

I purchased a NUC 12 Pro (Intel Core i5 12-Core w/ Integrated Intel Iris Xe Graphics) installed Ubuntu 22.04 server, docker (via snap) and have deployed plexinc/pms-docker:latest to it.

  plex:
    image: plexinc/pms-docker:latest
    container_name: plex
    volumes:
    - /mnt/nas/media:/media:ro
    - plex_data:/config
    - plex_transcode:/transcode
    networks:
      media:
        ipv4_address: 192.168.30.10
    devices:
    - /dev/dri:/dev/dri
    hostname: plex.local
    restart: always

I’m setting the appropriate env variables and everything seems to work as expected except HW transcoding.

Looking in the container, I do see dev/dri availble:

root@plex:/dev/dri# ls -l
total 0
crw-rw---- 1 root video  226,   0 Oct 22 11:47 card0
crw-rw---- 1 root video1 226, 128 Oct 22 11:47 renderD128

I installed lshw to see what was being seen and it appears to acknowledge the gpu

root@plex:/# lshw -c video
  *-display                 
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 0c
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: iomemory:600-5ff iomemory:400-3ff irq:183 memory:603c000000-603cffffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff

I’ve tried changing permissions on /dev/dri without luck.

looking it the logs, I see the following lines:

Oct 22, 2023 17:46:33.472 [140640125545272] DEBUG - [GPU] Got device: Alder Lake-P Integrated Graphics Controller, intel@builtin, default true, best true, ID 8086:46a6:8086:3024@0000:00:02.0, DevID [8086:46a6:8086:3024], flags 0x3ae7
Oct 22, 2023 17:46:33.472 [140640125545272] INFO - Preemptively preparing driver imd for GPU Alder Lake-P Integrated Graphics Controller
Oct 22, 2023 17:46:33.472 [140640125545272] DEBUG - [DriverDL/imd] Skipping download; already exists
Oct 22, 2023 17:46:33.472 [140640125545272] INFO - Preemptively preparing driver icr for GPU Alder Lake-P Integrated Graphics Controller
Oct 22, 2023 17:46:33.472 [140640125545272] DEBUG - [DriverDL/icr] Skipping download; already exists

I don’t see anything specific the HW transcoding in the logs. (nothing that references dri, hardware, transcoding, etc.) I do see a few references in the transcoding logs. I have ensured that HW transcoding is on in the settings of the server. “Use hardware-accelerated video encoding”

What am I missing?

Server Version#: Ubuntu 22.04
Player Version#: Version 1.32.6.7557

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