u/Fast-Desk-1547

This is the final update to my previous posts about the Dolby Atmos bug. If you missed the previous parts, you can check them here: (Initial report on 3.0.5.0) and (Follow-up on 3.0.301.0).

After more ADB diving, I found the "smoking gun". It's a massive packaging error.

I checked the internal config files in /vendor/etc/audio/sku_ravelin/audio_effects.xml. As you can see, the Dolby section is literally commented out with `` tags. In XML, this means the system ignores those lines. The drivers are there, but the OS is told not to load them.

Root Cause: Dolby lines are commented out () in the system XML.

I compared it with a POCO M6 Pro (HyperOS 3.0.5.0 WNFMIXM). In that device, the decoders (eac3, ac4, joc) are fully registered and working. This proves that the issue isn't HyperOS 3 itself, but a specific mistake in the X6 5G build.

POCO M6 Pro showing all active Dolby audio decoders.

Because of those commented lines, the POCO X6 only registers Dolby Vision (Video) and the Spatializer reports "not supported."

The Audio Policy Manager explicitly reporting the device is 'no supportted' (with a typo) due to the disabled config.

Media Framework only sees Dolby Vision (Video) while the hardware feature is set to 'true' but inaccessible.

It appears that these lines might have been left commented out by mistake during the compilation of the Global ROM. If this is indeed the case, since the file resides in the /vendor partition (which is read-only), a user-side fix isn't possible without Root access. Until Xiaomi provides an official statement or a fix, our best bet is to wait for a potential OTA patch that addresses this configuration.

I kindly ask you, if you own a POCO X6 5G or any other model affected by this bug, to please report this via the 'Services & Feedback' app. Mention the 'Commented XML lines in vendor audio SKU' so Xiaomi can see these reports. High visibility will encourage them to fix this build error and hopefully release an OTA patch soon.

Quick update for everyone following my previous post about Dolby Atmos being broken on the POCO X6.

I just installed the 3.0.301.0 update, and unfortunately, the results are the same. I ran the ADB diagnostics again from my Linux terminal, and here is the proof:

https://preview.redd.it/oy6nsnos3c1h1.jpg?width=635&format=pjpg&auto=webp&s=c3bd1f0033e9b5a10ccdf523294201a8b687e360

• Media Framework: Running adb shell dumpsys media.player | grep -i "dolby" still only shows Dolby Vision (video) decoders. The necessary AC4/EAC3 (audio) decoders are still missing from the system registry.
• Spatializer Status: The dumpsys audio command confirms the Spatializer is still "disabled (routing dependent)."
• Streaming Apps: Tidal and Apple Music still won't show the Atmos badge because the OS is reporting that it can't handle the codec.

Xiaomi has completely ignored the media framework bug that is preventing Atmos from working natively.

I’ve already submitted another report through the "Services & Feedback" app, but it seems we’ll have to wait for a more significant firmware overh.

Thanks Xiaomi.