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I have an Alienware 17 laptop (sometimes called M17RX5) which has a

Realtek ALC3661.

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The problem I describe here should also be valid for the Alienware 18

(all the late 2013 models, which are still the most current). At least some scattered forum reports suggest so.

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The card works almost perfect in Linux, but one functionality is

missing: The laptop features an HDMI input, and the Realtek card is supposed to take care of the incoming digital audio. This works fine in Windows, but in Linux, I only get the video and the audio stays missing.

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Here you can find my alsa-info:

http://www.alsa-project.org/db/?f=0a0502e49212a0436a30fde9d4ee56163bbc2ebc

The only digial input is node 0x0a

Try hda-jack-retask to change node 0x1f with pin default [Jack] digital In

Thanks a lot for your suggestion! I tried, 0x0a stays as "not present" but I can select it in alsa-mixer as expected. Sadly, I can only record silence. Also setting Jack Detection to "Present" in the advanced overrides of hdajackretask did not help.

Do you have further ideas / is there more information I can provide / collect?

Cheers, Oliver

Node 0x0a [Audio Input] wcaps 0x100791: Stereo Digital Converter: stream=0, channel=0 SDI-Select: 0 Digital: Digital category: 0x0 IEC Coding Type: 0x0 PCM: rates [0x570]: 32000 44100 48000 96000 192000 bits [0xe]: 16 20 24 formats [0x1]: PCM Unsolicited: tag=00, enabled=0 Power states: D0 D1 D2 D3 EPSS Power: setting=D0, actual=D0 Connection: 1 0x1f

Node 0x1f [Pin Complex] wcaps 0x400681: Stereo Digital Pincap 0x00000020: IN Pin Default 0x411111f0: [N/A] Speaker at Ext Rear Conn = 1/8, Color = Black DefAssociation = 0xf, Sequence = 0x0 Misc = NO_PRESENCE Pin-ctls: 0x20: IN Unsolicited: tag=00, enabled=0 Power states: D0 D1 D2 D3 EPSS

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In Windows, I observe the HDMI-IN audio routing to the speakers is only

done if the Realtek Audio Service is running. In Linux, I observe keypress-events when I either switch manually to the HDMI-in signal and also if a new signal is detected (something (the UEFI?) injects a keypress then). I assume the service in Windows catches these events and changes "something" in the Realtek Audio Settings. I see no special recording device in Windows, nor any explicit HDMI-input setting, nor any related setting in the driver. Dell links a standard Realtek driver in their support section.

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Note the laptop has a single HDMI connector which can be used both for

input and output (so the nvidia-card also shows one HDMI-out). The second NVIDIA audio out is very likely from the mini-display-port of the laptop.