Did you see my Synology - DSM 7 (version 2.0) - Docker How-To?
I show the steps you need take to get the UID/GID for “PlexMediaServer”
then how to setup the command line docker to access /dev/dri since it’s blocked in DSM 7 GUI
Since I’ve proven to myself that making assumptions always leads me to certain failure, I’ll ask: does doing the Docker Overlay on my Synology DS1520+ (4 core Celeron J4125) allow me to do HDR Tone Mapping on this system?
If you do the command-line creation of the container (because the Syno gui doesn’t allow passing the GPU), ----
YES, it works.
Matching UID/GID keeps DSM 7 happy.
PMS, because it’s installed, has access to the HW through the UID/GID (the trick)
The runtime libraries are in the docker container