Xbox One can't setup a TV Anymore

@Studbucket33, Microsoft promote the Xbox One as "Home Entertainment System" It can't be that, if you can't control the volume with the Xbox controller. So I'm back with 2 remote devices to control one of the main functions. In this case I can better use
my smart TV as HES and the XBO as just a game console. Then I still have 2 remote but I don't need my phone where the battery time is short. Please fix that.

TV setup: I'm German living in the US. I do have some problems with the voice control because of my accent. I switched on the Xbox to German language and it works more the perfect. But then I can't use the TV function anymore, because I don't have the options
for the US cable box. During the setup for the German language, I can only choose the location Germany or Austria whats the reason for missing the setup for the cable box. I'm the only German in the US?

Tom

I can't help answering your question, but I do appear to have the same issue. During some scenes the movements are definitely stuttering, compared to the regular bluray player. I've tried using the 24hz setting but that ended up giving audio sync issues,
where it didn't exactly match up anymore, but even the stuttering was still there at 24hz.

My setup is Cable TV -> XBOX One -> Receiver -> TV. Audio is connected via optical to receiver.

I would confirm the TV to xbox setup. Check the cables, TV input and output. Confirm setup if your TV is setup to include one guide because the cables could be crossed.

see next link to setup live TV :

https://support.xbox.com/en-us/xbox-one/live-tv/set-up-live-tv

"My setup was working fine (TV power on/off toguether when XBox on/off) but suddenly not anymore. "

Without knowing what steps you have already taken, all I can think of is

Try this..

Guide > System > Settings > General > TV & Display options > TV & AV power options and check the Note at the top of screen where it mentions toggles.

In the TV setup you could try setting that to nothing and do a Full shutdown and restart of the TV, AVR then console. Go back into the options and reconfigure the TV setting and restart again.