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Drivers & Software

Adept III

No Dolby Atmos with LG C9 and 21.6.1


with the new 21.6.1 and the AMD HDMI Audio Driver (2nd March 2021) that comes with this release, Dolby Atmos cannot be activated in Windows 10. It jumps directly back to stereo or says "format not supported by device".

When I use the old HDMI Audio driver from Oct. 2020 (part of 21.5.2) everything works instantly fine.

I use a 6900XT.

Greetins, cvzone

PS: Connecting a soundbar directly to the 6900XT works will Dolby Atmos. LG C9 factory reset had no effect. So i guess it is a handshake problem with several (but not all) devices.


4 Replies
Adept I

Any solution yet?


It seems that from windows 8.1 onwards, dolby is part of the OS. So naturally most program developers has removed Dolby support
Digital Dolby for Windows 10 and is still supported for Stereo it is the Surround Sound option that is no longer supported
When we use a video containing Surround Sound the program sees it as being stereo having the two channels L / R

AMD Ryzan 5 3600, Asus GeForce GTX 1650 Graphics (522.30), Asus Prime B550M-A LGA 1200 mATX Motherboard, (BIOS 2003) Cooler Master MWE White 230v 550W 80+ V2 Power,500GB SSD, 16GB DDR4 Ram, 2TB HDD, 32inch Phillips 1920 x 1080 Monitor, Samsung 28 inch 3840x2160 UHD 4K LED Monitor. Win 10 21Hl, Build 19043.11466

Thing is, using any nvidia card and Dolby app no such problem occurs. Full Dolby Atmos 7.1 win10/11 support instantly. 

It’s amd’s audio driver the problem.

Journeyman III

Omg, thanks man! It's AMD driver issue it seems.

I have been strungling for a while with unable to choose Dolby Atmos Theater until I found your post! AMD latest driver (Adrenalin 22.11.2) still doesn't work but I manage to do a work around by installing old HDMI Audio driver that you mentioned (21.5.2).


AMD HDMI audio driver can be found under: