# Intel UHD 770 Hardware Transcoding Not Working - AVHWDeviceContext Error **URL:** \ **Category:** Plex Media Server\ **Tags:** server-unraid\ **Created:** [November 10, 2025, 10:44pm UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399 "2025-11-10T22:44:19Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 10, 2025, 10:44pm UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/1 "2025-11-10T22:44:19Z")
Server Version#: Version 1.42.2.10156 Player Version#: Version 4.147.1 Hi Plex Community, Hardware transcoding fails on i5-13600K with UHD 770 despite correct configuration - getting “No matching devices found” errors —————————————————- **Server Setup:** Plex Pass **Server Version:** Latest (using linuxserver/plex Docker) **Player Version:** Web player (Firefox) **Hardware:** - CPU: Intel Core i5-13600K (13th gen Raptor Lake) - iGPU: Intel UHD Graphics 770 - Motherboard: ASUS TUF GAMING Z790-PLUS WIFI D4 - RAM: 128GB DDR4 - OS: Unraid 6.12.15 - Container: linuxserver/plex (also tested with official plexinc/pms-docker) **Problem Description:** Hardware transcoding isn’t working despite Plex detecting the Intel UHD 770 GPU. When transcoding (especially HDR content), I get these errors in the logs: `[AVHWDeviceContext @ 0x14a0a6e17780] No matching devices found.` The GPU shows 0% utilization in `intel_gpu_top` while CPU cores hit 70%+ during transcodes, confirming it’s using software transcoding. **What I’ve verified:** 1. `/dev/dri` devices are present and accessible: ```auto crw-rw-rw- 1 root video 226, 0 card0 crw-rw-rw- 1 root video 226, 128 renderD128 ``` 1. Docker container has proper device mapping (`--device=/dev/dri:/dev/dri`) 2. Container user is in video group (confirmed with `docker exec plex id`) 3. Plex settings show: 4. Plex logs show it’s preparing the drivers: ```auto Preparing driver icr for GPU Intel Raptor Lake-S GT1 [UHD Graphics 770] Preparing driver imd for GPU Intel Raptor Lake-S GT1 [UHD Graphics 770] ``` But then fails with AVHWDeviceContext errors immediately after. **Tested configurations:** - Both official Plex Docker and [LinuxServer.io](http://LinuxServer.io) versions - HEVC encoding set to “Never”, “HEVC Sources Only”, and “Always” - Added DOCKER\_MODS for OpenCL Intel support - Tried HardwareDevicePath environment variable - Different tone mapping algorithms The strange part is Plex clearly sees the GPU and tries to use it, but something fails during the actual hardware initialization. Most of my library is 4K HDR so hardware tone mapping is pretty critical for me. Has anyone successfully gotten 13th gen Intel iGPUs working with hardware HDR transcoding in Docker? What am I missing here? [Plex Media Server Logs\_2025-11-11\_09-32-19.zip](https://forums.plex.tv/uploads/short-url/cxPw6HZM2EXqWRID2edEBiL4VlS.zip) (3.8 MB) ---
**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\ **Post date:** [November 10, 2025, 11:54pm UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/2 "2025-11-10T23:54:26Z")
DOCKER\_MODS will interfere with HW transcoding. Remove them. Thank you for the logs, I see: ```auto Nov 11, 2025 09:24:28.472 [22715345890104] INFO - Preemptively preparing driver imd for GPU Intel Raptor Lake-S GT1 [UHD Graphics 770] Nov 11, 2025 09:24:28.472 [22715345890104] DEBUG - [DriverDL/imd] Skipping download; already exists Nov 11, 2025 09:24:28.472 [22715345890104] INFO - Preemptively preparing driver icr for GPU Intel Raptor Lake-S GT1 [UHD Graphics 770] Nov 11, 2025 09:24:28.472 [22715345890104] DEBUG - [DriverDL/icr] Skipping download; already exists ``` PMS doesn’t see the hardware (not the right UID/GID & privilege) ```auto Nov 11, 2025 09:26:01.079 [22715186490168] DEBUG - [Req#d55/Transcode] TPU: hardware transcoding: enabled, but no hardware decode accelerator found Nov 11, 2025 09:26:01.079 [22715186490168] DEBUG - [Req#d55/Transcode] [Universal] Using local file path instead of URL: /Umovies/........mkv Nov 11, 2025 09:26:01.079 [22715186490168] DEBUG - [Req#d55/Transcode] TPU: hardware transcoding: final decoder: , final encoder: ``` 1. Are you using the default UID / GID ? 2. Are you running the container privileged ? 3. When you get into the container command line, ```auto ls -la /dev/dri ``` 1. see if the Plex user is a member of that group `groups plex` ---
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 11, 2025, 12:07am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/3 "2025-11-11T00:07:07Z")
Hi Chuck! 1. Yes they are default PLEX\_UID=99 & PLEX\_GID=100 2. No it is running as a normal Docker Container with the plexinc/pms-docker repo 3. root@ConnorsServer:~# docker exec -it Plex-Media-Server ls -la /dev/dri total 0 drwxr-xr-x 2 root root 80 Nov 11 10:37 . drwxr-xr-x 6 root root 360 Nov 11 10:37 .. crw-rw-rw- 1 root video1 226, 0 Nov 11 10:37 card0 crw-rw-rw- 1 root video1 226, 128 Nov 11 10:37 renderD128 1. root@ConnorsServer:~# groups plex groups: ‘plex’: no such user Thank you! ---
**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\ **Post date:** [November 11, 2025, 12:09am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/4 "2025-11-11T00:09:05Z")
This is a BAAAAAD time for my unraid box to be down. (old fart failing memory) which username is ID = 99 ? ---
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 11, 2025, 12:10am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/5 "2025-11-11T00:10:39Z")
> [@ChuckPa](#): > > which username is ID = 99 ? 99 = nobody 🙂 or at least on my system root@ConnorsServer:~# getent passwd 99 nobody:x:99:100:nobody:/:/bin/false root@ConnorsServer:~# ---
**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\ **Post date:** [November 11, 2025, 12:11am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/6 "2025-11-11T00:11:40Z")
`groups nobody` Is it a member of `video1` (non-privileged operation) ---
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 11, 2025, 12:13am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/7 "2025-11-11T00:13:12Z")
this is what it gave me: root@ConnorsServer:~# groups nobody nobody : users nobody root@ConnorsServer:~# grep ‘^video1:’ /etc/group root@ConnorsServer:~# ---
**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\ **Post date:** [November 11, 2025, 12:23am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/8 "2025-11-11T00:23:09Z")
Stupid test time: ```auto chmod 666 /dev/dri/card0 chmod 666 /dev/dri/renderD128 ``` this will confirm if inside or outside the container PS: I’m going to need somebody’s help getting my unraid box running again. (nuc7 4x4 box). I bricked the USB hard ---
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 11, 2025, 12:33am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/9 "2025-11-11T00:33:04Z")
![image](https://global.discourse-cdn.com/plex/original/4X/8/4/2/842ecfc124c4e4f9902a88ea3352bcc1732bab4e.png) ![image](https://global.discourse-cdn.com/plex/original/4X/8/b/0/8b029df66060d93a01c3fb8f5177c187c10ac580.jpeg) ![image](https://global.discourse-cdn.com/plex/original/4X/a/c/c/accdc77f64dc7ecb1de028ef42d14c51c7778e0a.jpeg) (Sorry for the badly formatted pictures) Plex seems to believe that it is still using hardware transcoding, but in unraid i cannot see it using the igpu at all. And here is an intel top: ![image](https://global.discourse-cdn.com/plex/original/4X/1/1/e/11e8b96211e1e1c962a8a6e0c06c8f68f7d13aa3.png) it is very strange that unraid does not show that it is being used, but plex believes that it is and i did run the chmods before taking these pictures ---
**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\ **Post date:** [November 11, 2025, 1:50am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/10 "2025-11-11T01:50:41Z")
Just got Unraid reloaded (7.2) I’m about to see if I can import the existing pool/array As soon as I get my container up, I’ll be able to help more. I’m not surprised gpu\_top not showing the utilization. It’s in a different Namespace (the container) What does ‘top’ show? PS: May I DM you about what plug-ins & tools to install ? ---
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 11, 2025, 1:58am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/11 "2025-11-11T01:58:56Z")
Awesome news thank you for the update! Running top gives me this: (while still testing with Interstellar @12Mbps 1080p) ![image](https://global.discourse-cdn.com/plex/original/4X/e/6/2/e62e601938593f521cb07c375bde8872a341ce21.png) And yes of course please DM me as I really would love to use Hardware Transcoding! ---
**Author:** ![ImConnor](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@ImConnor](https://forums.plex.tv/u/ImConnor)\ **Post date:** [November 12, 2025, 4:30am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/12 "2025-11-12T04:30:51Z")
I was able to resolve it by doing this in order: What I did was I uninstalled the intel plugin and the gpu stats plugin, updated from 6.12.15 → 7.2.0 (let that churn and work for 20 minutes) once it turned back on installed those plugins again (did not reboot) and I can see that the iGPU is working now. Thank you for all of your help and troubleshooting Chuck. ---
**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\ **Post date:** [February 10, 2026, 4:30am UTC](https://forums.plex.tv/t/intel-uhd-770-hardware-transcoding-not-working-avhwdevicecontext-error/933399/13 "2026-02-10T04:30:55Z")
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