Xbox Series X, LG CX, hdmi cec - cant change tv volume

Have you checked the TV itself?

I have an LG TV (different model) and sometimes HDMI-CEC is disabled on my Xbox One X's HDMI input after I change audio output (if I want to use my headphones for a while, for example). Its weird, I've never been able to get to the bottom of why
it happens but, sure enough, go to my TV's general settings while on the HDMI input and SIMPLINK (LG's name for HDMI-CEC) is off. Turn it back on and I'm good to go.

- Jason

Thx for reply, i will try a few things, i have since read, to turn on HGIG on my LG CX TV, then do the hdr calibration on the xbox series x.

Hi TexasMaster9351! My name is Ricardo an independent advisor ready to help you with this situation!

HDMI-CEC is supported only on Xbox One X, Xbox Series S, and Xbox Series X. You must also enable HDMI-CEC on your TV.

Xbox Series X|S consoles can use an HDMI feature called Consumer Electronics Control (CEC) to send commands to and from CEC-enabled devices (such as TVs and AVRs) that are connected to the console.

This feature can be turned on and off via the TV & A/V power options settings screen. Press the Xbox button  to open the guide, then go to Profile & system > Settings > General > Sleep mode & startup > TV & A/V power options.

Looking into a bit more,

when the series x is connected directly to my LG CX, Via the secret DVI/HDMI status menu DD bitstream reports as AC3 9ch 48000Hz, Stereo uncompressed reports as PCM 2Ch 48000Hz, Atmos reports as MAT 8Ch 192000Hz so it all looks ok here, cant test DTS as the 2020 CX doesnt support DTS.

Matt

To achive 4K at 120hz your TV needs to have HDMI 2.1 ports and supports 120hz, such as the LG CX TV,

The bandwidth limit of HDMI 2.0 will only allow 4K at 60hz.