[Audio Config] can't acces to 5.1 speakers anymore 17.2

I'm facing trouble with my audio speakers system.
the Realtek HDaudio drivers are up to date.
Resolve 17.2
Last Win10 from 05/11

If I select System settings, it says that I got stereo speakers (false, win10 tests are ok and correctly plugged)


If I select Manual, I have to select all speakers one by one and it just does'nt work properly, All I got is a stereo monitoring even if I pan sound on the rear, I got just sound on the front.



Any Idea?

Is your main bus set to 5.1?

Thanks..

I though it will override the bus. my apologies.