Series X CEC not controlling volume correctly

I've had the same issue since launch. Seems widespread, but I haven't seen any posts about it lately. Was hoping for a fix a while ago.

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.

Hello,

I found this support page with some troubleshooting for the HMDI CEC: How do I control other devices using HDMI-CEC? | Xbox Support

I also found a thread where the last poster may have found a resolution to this issue: Xbox Series S - HDMI-CEC Volume Control not working - Microsoft Community, stating:

For anyone looking for the resolution, you have to use hdmi cables, even to your soundbar or sound system now

Previously I had my xbox series x I had an optical cable from tv to bose soundbar 700 and the older xbox would control it and raise and lower the volume, I had to swap that cable out for HDMI instead...

With more details I would check that out to see if it helps.

Also, it would help if you submitted a Report a Problem so we can take a look at what's going on with your xbox when this issue happens. You can find the guidance here. It also seems like some have found the builds in Xbox Insider have the update that may help with this issue in the test builds and updates.

Provide feedback to Team Xbox | Xbox Support

Thank you,

if you correctly read the post it is on about a series x controller.

***UPDATE***

I appear to have fixed this. It was something to do with HDMI-CEC on the Series X.

I have the following toggled;

Console turns on other devices

Console turns off other devices

Other devices can turn console off

The other two choices seem to not work well with the monitor when running 4K/120hz/HDR for whatever reason;

Console sends volume commands ⛔

Switch TV input using controller ⛔

I never had 'Console sends volume commands' on but I did have 'Switch TV input using controller' on so I'm unsure why if at all it should have affected anything.

As a side note after toggling the HDMI-CEC on and picking my choices - that prompted an auto Xbox restart anyway but afterwards I did a manual restart myself and factory reset my monitor once more just to cover all bases as it were.

I'm not sure exactly what combination worked but I'm pretty sure it was something to do with HDMI-CEC and what I chose as my options.

Anyone's guess is as good as mine at this point.

Thanks for reading, all the best.