Thanks
I have added it to the evidence set I referred to our development team
The Server development team have asked if this is a general issue affecting all Plex Tuner Service managed DVRs on Linux and Docker.
Have you looked into the Hauppauge drivers ?
See
Hauppauge | TV Tuners for Plex
and
Hauppauge Support | Linux
Also there are some forum threads relating to DVR and permissions / groups
(I don’t know if information there is still valid)
e.g.
and