Intel Quick Sync passthrough to Plex LXC stopped working

[Nuno]

I have a LXC runing Plex and HW acceleration always worked well, first with Nvidia GPU Passthrough (1050TI) and after with Intel Quick Sync.
Today I noticed that plex was not HW transcoding..

When i run ls -la /dev/dri , I get strange values to renderD128

drwxr-xr-x 3 root root 100 May 6 23:44 .
drwxr-xr-x 20 root root 5100 May 6 23:44 ..
drwxr-xr-x 2 root root 60 May 6 23:44 by-path
crw-rw---- 1 root video 226, 0 May 6 23:44 card0
---------- 1 root root 0 May 6 23:44 renderD128

instead of:
crw-rw---- 1 root render 226, 128 May 6 23:44 renderD128
i get:
---------- 1 root root 0 May 6 23:44 renderD128

How to solve it?
I am totally lost...

 

[dcsapak]

anything in the journal or dmesg after the boot that could give a hint what might be wrong?