SOLVED: Jellyfin Requires chmod -R 777 Periodically for Hardware Transcoding

SOLVED: Jellyfin Requires chmod -R 777 Periodically for Hardware Transcoding - Printable Version

+- Jellyfin Forum (https://forum.jellyfin.org)
+-- Forum: Support (https://forum.jellyfin.org/f-support)
+--- Forum: Troubleshooting (https://forum.jellyfin.org/f-troubleshooting)
+--- Thread: SOLVED: Jellyfin Requires chmod -R 777 Periodically for Hardware Transcoding (/t-solved-jellyfin-requires-chmod-r-777-periodically-for-hardware-transcoding)

Jellyfin Requires chmod -R 777 Periodically for Hardware Transcoding - Kein - 2025-01-12

Hi,

I’m encountering a recurring issue with my Jellyfin setup where hardware transcoding stops working unless I manually adjust permissions for /dev/dri. Here are the details of my setup and problem:

System Details:

Jellyfin Version: 10.8.10

Platform: Ubuntu 24.04.1 LTS

Installation Method: Docker

Hardware:

CPU: Intel Core i5-7500 (with integrated Intel HD Graphics 630)

GPU: Using /dev/dri for Intel iGPU hardware acceleration

Issue Description:
Hardware transcoding works correctly after a fresh setup. However, periodically transcoding fails, and I need to run the following commands to restore functionality:

sudo chmod -R 777 /dev/dri
docker restart jellyfin

I expect Jellyfin to consistently access /dev/dri for hardware transcoding without requiring manual intervention.

Steps Taken:

1. Mounted /dev/dri in the container using:

--device /dev/dri Confused-face

dev/dri

2. Set permissions 660 for /dev/dri to see if there's any difference:

sudo chmod -R 660 /dev/dri
sudo chown -R root:video /dev/dri

3. Added the Docker user to video and render groups:

sudo usermod -aG video,render $(whoami)

Despite these efforts, the issue reappears after some time. I’m unsure if this is due to Docker, system permissions resetting, or Jellyfin’s handling of /dev/dri.

Logs:
I’ve attached debug-level logs showing what happens when transcoding fails (available upon request).

What I Need Help With:

How can I ensure persistent access to /dev/dri for Jellyfin without needing to run chmod and restart the container?

Is there a better way to configure permissions or system settings to fix this issue?

Thank you in advance for your help!

Does this adhere to the guidelines and clearly explain the problem?

RE: Jellyfin Requires chmod -R 777 Periodically for Hardware Transcoding - TheDreadPirate - 2025-01-12

You need to pass in the render group into the container.

Code:
group_add:

      - '993' # Intel render group