I have had Plex hardware transcoding working for a long time and this AM I installed a GPU to pass through to a VM. I have lost hardware transcoding on Plex. The dropdown box only shows auto so I cannot pick it from the Plex settings. I am on Unraid using the official Plex docker. I understand that I may need to update the Plex preferences XML file. The problem is I have no idea what to put in there, as I have found the following on the Plex forums. "
User plex is added to the group of the first card found
To manually override the device used, specify HardwareDevicePath=“/dev/xxxxxxxxx” in Preferences.xml (while Plex is stopped)
udev should be adding both devices to the same group (render)"
I am unsure what to replace the XXXX with or where to find out.
Thanks for any help you can provide.
