My pc is a dell inspiron 14r (3450p), when I connect my home theater (sony bdv-e280) to my laptop through the HDMI interface on my HD4000 graphics windows only enables stereo audio and I can´t change this. I´ve tried every available driver on the internet, updated the drivers for the graphics card and still doesn´t work. Here are some prints:
some information are in portuguese.
I´ve seen many people with similar problem but updating the drivers hasn´t worked for me as it worked with them.