Apple TV 4K not waking or putting Sony TV to sleep (HDMI-CEC problem?)

[DioramaSky]

My setup: Sony BRAVIA X950G with a Sonos Beam and an Apple TV 4K.

I always have to hit the home button on the Apple TV remote multiple times to wake the Sony TV up, and whenever I put the Apple TV to sleep, it never puts the Sony TV to sleep. The Apple TV goes to sleep, just leaving a "no input" screen on the TV. I just end up having to turn the TV off manually.

I've tried it with the "Control TVs and Receivers" both turned on and turned off in the Apple TV settings.

I also have ensured the HDMI-CEC (in this case, "BRAVIA Sync") is turned on in the Sony TV and I see the Apple TV in the enabled list.

I'm not sure if maybe the Sonos is to blame; the "Audio Output" in the Apple TV settings seems to sometimes have the Apple TV icon selected and sometimes the speaker icon selected, and I have no idea why. Maybe it's interfering with the Apple TV's control of the Sony TV?

Anyone have a similar experience or can offer any suggestions?

Thanks so much.

 

[DioramaSky]

So I've determined that I can turn both the Sony BRAVIA TV and the Apple TV OFF by using the Sony remote, and I can turn both of them ON using the Apple TV remote. Those correspond to the BRAVIA Sync settings (pasted below). Maybe that's all the functionality allowed by the Sony BRAVIA TV?

[BRAVIA Sync control]
[Device auto power off] Power off HDMI devices with the TV.
[TV auto power on] Power on the TV with a connected HDMI device.
[BRAVIA Sync device list]
[Device control keys] Tuning keys

 

[priitv8]

In general, CEC is built around the TV as a control hub of all other devices.

 

[Tech198]

CEC is just a bundle of nerves...

No manufacture can agree one how it should be done universally. That's why so many have problems. Different names, depending on which brand/model hardware you have.. partially working.... its a living nightmare.

But when it can work, its convenient.

 

[priitv8]

CEC is just a bundle of nerves...

There is still a document that standardises its behavior.
And it defines TV as device #0 - root device.

 

[matrix07]

Never have these problems with my Sharp Aquos.

 

[DblHelix]

Works fine with my Sony tv. I believe mine is 2 generations before yours