Summary Plex Media Server is unable to initialize VAAPI hardware transcoding on an Intel Arc Pro A40 GPU passed through to an Ubuntu 24.04.3 VM. System VAAPI works perfectly, and system ffmpeg can use VAAPI correctly under the same user, but Plex’s bundled ‘Plex Transcoder’ binary fails immediately…

Hi all—I wanted to humbly report that I’ve resolved the VAAPI issue in my setup, and it turned out to be a PICNIC (problem in chair, not in computer). I let the issue sit for a while. For a long time, Direct Play worked perfectly, Direct Stream mostly worked, but any video transcoding would fail ov…

Looking at picking up this exact card, but I’m a little confused as to why the A40 isn’t supposed to work due to lack of Alchemist drivers. I’ve been browsing through this forum and the TrueNAS one, and it seems that people are reporting the A310 , A380, and Arc Pro A60 as working. These are all Alc…

@erichng The problem is the combination of the new Transcoder. In the old (production) transcoder, the drivers are there. The new transcoder doesn’t have them yet. This is a build issue Chris is working on

(Forgot to hit the Reply button, so reposting) So to clarify, Alchemist GPUs should work with the current public “stable” release build, but not yet with the newer betas with the new transcoder? Edit: Actually, I’m still confused, because @slhogg seems to be on 1.42.2.10156, which is seemingly on …

Hello. I am sorry I didn’t jump back into troubleshooting sooner - I just noticed that a beta release was made available on December 3rd for version 1.43.0.10389: [VM 0] I downloaded with the command: cd ~ wget ``https://downloads.plex.tv/plex-media-server-new/1.43.0.10389-8be686aa6/debian/ple…

[image] erichng: Looking at picking up this exact card, but I’m a little confused as to why the A40 isn’t supposed to work due to lack of Alchemist drivers. I’ve been browsing through this forum and the TrueNAS one, and it seems that people are reporting the A310 , A380, and Arc Pro A60 as worki…

[image] ChuckPa: The problem is the combination of the new Transcoder. In the old (production) transcoder, the drivers are there. The new transcoder doesn’t have them yet. This is a build issue Chris is working on Can I get clarity. I have a server with the sparkle 40w a310 card, its dock…

Thanks for the detailed write up. I think I’ll have to wait and see how things work out for ARC A40 Pro support then. Seems to be pretty unfortunate timing with TrueNAS dropping Pascal support (currently on the Tesla P4), and Intel ARC support on Plex. I’m still a little puzzled as to why there see…

[image] erichng: I’m still a little puzzled as to why there seem to be others with success, supposedly with the A40 Pro and/or other A series Pro cards, yet that doesn’t seem to be the case with you. I’m also a bit puzzled by this. My current understanding is that one (or both) of the followi…

Pretty simple. Ubuntu Desktop LTS, Docker, as below: [image] Home cameras via Homebridge Docker get routed through igpu. Plex gets directed to the sparkle a310.

Hello everyone. I wanted to point out that I’m experiencing the exact same problem as slhogg. Environment Hardware CPU: AMD 9700X GPU: Intel Arc A380 Host OS: Proxmox 9.1.2 (kernel 6.17.2-2-pve) GPU passthrough: via PCIe to LXC (works correctly) LXC OS: Ubuntu 25.10 Kernel: 6.17.2-2-pve CPU: 6 …

Plex Transcoder Cannot Initialize VAAPI on Intel Arc Pro A40 (DG2)

Plex Media Server

FordGuy61 February 22, 2026, 8:02am 31

See this thread for Battlemage GPUs: Battlemage Support - #245 by chris_decker08

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Plex Transcoder Cannot Initialize VAAPI on Intel Arc Pro A40 (DG2)

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