I set up a Linux pc to replace my smart TV and add some gaming capabilites. It took some time but I learned quite a lot (Thanks to Debian and Arch wikis). And I haven't missed any TV functionality.
The launcher is flex-launcher on a labwc environment/compositor on a Debian stable distro. (For testing and easy setup, I also did it on Ubuntu Gnome but I don't need a full DE in the background that I don't use. But it's adaptable to other distros and DEs.)
It's now fully usable with a gamepad including turning the TV on and off, so I have also fully replaced the TV remote.
I hope some people may find it interesting. It was also quite a lot of fun, actually.
Bitstreaming/passthrough for lossless formats like Dolby TrueHD (including Atmos) and DTS-HD Master Audio (including DTS:X) works perfectly on Linux.Linux does not natively decode Dolby Atmos or DTS:X because it lacks the commercial licenses to process the spatial metadata. However, Linux excels at HDMI Audio Passthrough. Instead of processing the audio, your Linux machine treats the uncompressed bitstream like a raw data package and forwards it directly to your AV receiver via HDMI. The receiver recognizes the signal and handles the heavy decoding lifting.
When I look at the settings and the wiki, it says passthrough still won't work with DTS-HD or Atmos:
https://kodi.wiki/view/PulseAudio