https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #8 from Alex Deucher alexdeucher@gmail.com 2013-04-30 12:57:39 --- (In reply to comment #7)
Yes, I'm quite sure my laptop is mux-less, so I guess the card actually works but cannot output anything... I've 1.13.4 installed (and 1.14.1 is available in portage softmasked). Is there any chance I could make use of this?
You can use xrandr to configure it using the -setprovideroutputsource and -setprovideroffloadsink parameters