[SOLVED] Plex hardware transcoding not working anymore

[Dulcow]

Hi there,

I recently noticed that my Plex setup in LXC (I followed this guide https://forum.proxmox.com/threads/i...-in-debian-unprivileged-lxc-container.132520/) isn't working anymore. I moved to 6.8.4-3-pve and I updated Intel microcode. I'm running Proxmox 8.2.2 with Plex (1.40.2.8395) in an unprivileged container.

I'm wondering if something changed (permissions, etc.) because I can see this in the LXC container:

root@plex-iglass:~# ls -al /dev/dri
total 0
drwxr-xr-x 3 nobody nogroup      100 May  9 14:16 .
drwxr-xr-x 7 root   root         500 May  9 14:16 ..
drwxr-xr-x 2 nobody nogroup       80 May  9 14:16 by-path
crw-rw---- 1 nobody nogroup 226,   0 May  9 14:16 card0
crw-rw---- 1 nobody render  226, 128 May  9 14:16 renderD128

vainfo seems to fail on the host as well (driver issue?)

root@pve-nuc12-1:~# vainfo
error: can't connect to X server!
libva info: VA-API version 1.17.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exit

Has anyone ran into such issue lately?

Thanks,

D.

 

[Dulcow]

Reverting and pining Kernel to "6.5.13-5-pve" fixed the issue.

I will try again on a regular basis with more recent kernels...

D.

 

[kesawi]

Plex has issues intel HW transcoding with Linux kernel 6.8.

See https://forums.plex.tv/t/ubuntu-24-04-hw-transcoding/873765/29 and https://forums.plex.tv/t/ubuntu-24-04-hw-transcoding/873765/40.

 

[Dulcow]

Thanks for the nudge ;-)