[Bug 67321] Cannot hear anything using HDMI/DisplayPort audio connection on Intel D54250WYK

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=67321

--- Comment #6 from Philip Langdale <kernelbugs.philipl at overt.org> ---
Created attachment 121591
  --> https://bugzilla.kernel.org/attachment.cgi?id=121591&action=edit
alsa-info

I've attached the alsa-info.txt.

More notes:

1) Using either the displayport or the hdmi port, audio does not work.
2) Using the analog audio port (which is on the separate PCH audio controller)
works fine.
3) The ELD information looks correct for both displayport and hdmi. I see the
right device identity and capabilities reported
4) When the computer is playing audio, /proc/asound reports the right device in
use and valid sample format information, etc. But of course, no sound is
produced.
5) I've verified that the displays in question (Dell Ultrasharps) do correctly
output sound from other computers.

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