I am running Fedora 24 with kernel 4.7.9 on a XPS13 9360 Developer Edition.
When I am directly connecting with a USB Type-C to HDMI Adapter with my display (a DELL U3417W), everything is fine in terms of Audio. I am getting a "HDMI" audio device and the display receives and plays sound.
When I am using the WD15 to connect to the display either via the WD15's HDMI or mDP port, I get a "USB Analog Audio" device - with the result, that audio is available on the front port of the WD15, but not available digitally to the monitor. Problem is - i do not have an analog input on my DELL display.
Does anybody else have any success transmitting audio signals via
XPS13 -> USB Type-C -> WD15 -> HDMI port?
Is this broken by design or just a WD15 firmware issue that might get fixed in the future?