I just bought the Home Theater system LS 650. I have connected through one of the HDMI inputs a computer that I use as media center. Windows identifies the Bose system without major problems and it shows as Playback device in Windows: "Bose LS". So far, so good.
The problem is that Windows shows it as Stereo. When I had my previous home cinema system (not Bose), I could go to the Windows sound settings (Sound Control Panel) and configure the speakers so that they are not just Stereo but 5.1 (or any other configuration that my AV receiver could manage). However, with Bose, although Windows does let me choose all sort of configurations too (stereo, 2.1, 3.1, 5.1, etc.), no matter what I select besides stereo, Windows does not play any sound. Then I run "Troubleshooting sound problems" and it basically sets it back to Stereo.
Playing a 5.1 video from Windows seems to work ok, at least sound is coming from all 5.1 speakers, but I can't tell if it's correct as Windows seems to be sending the audio to Bose LS in Stereo mode.
For the record, I am using the latest version of Windows 10 (1809) and the latest Bose fw version too.
So, am I doing something wrong? Why Windows will not accept any other sound configuration than Stereo?