Am 02.02.2015 um 08:05 schrieb Raymond Yau:

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I have an Alienware 17 laptop (sometimes called M17RX5) which has a Realtek ALC3661. 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

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

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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.

http://git.alsa-project.org/?p=alsa-tools.git;a=blob;f=hdajackretask/README;...

You have to select "show unconnected pin" and "advanced override"

Change the pin default of node 0x1f to 0x3c61130 [Jack] SPDIF In

Set as boot default and reboot

Digital capture device 1 will be created after you fix the pin default of node 0x1f

Turn on iec958 capture switch and try

arecord -D IEC958:CARD=PCH -f dat -v test.wav

Thanks a lot for your continued help! Here's what I did - the sad news, I still record only silence: 1. use hdajackretask as you explained, apply as boot default. 2. I got the following files: /etc/modprobe.d/hda-jack-retask.conf (below the automatic comment): options snd-hda-intel patch=hda-jack-retask.fw,hda-jack-retask.fw,hda-jack-retask.fw,hda-jack-retask.fw /lib64/firmware/hda-jack-retask.fw: [codec] 0x10ec0668 0x102805aa 0 [pincfg] 0x12 0x99a30140 0x14 0x90170110 0x15 0x0321101f 0x16 0x03211020 0x18 0x40030008 0x19 0x03a11030 0x1a 0x411111f0 0x1b 0x411111f0 0x1d 0x41000001 0x1e 0x411111f0 0x1f 0x03c61130 It contains exactly the line 0x1f 0x03c61130, so I hope I clicked correctly in the GUI. 3. After reboot, I see in dmesg (I assume this means it worked): [ 6.021374] snd_hda_intel 0000:00:1b.0: Applying patch firmware 'hda-jack-retask.fw' [ 6.021468] snd_hda_intel 0000:01:00.1: Disabling MSI [ 6.021471] snd_hda_intel 0000:01:00.1: Applying patch firmware 'hda-jack-retask.fw' [ 6.022749] snd_hda_intel 0000:00:1b.0: irq 29 for MSI/MSI-X 4. I activate S/PDIF capture in alsamixer (IEC958 is not shown there, but S/PDIF appeared new after the change). 5. arecord -L tells me at the end: iec958:CARD=PCH,DEV=0 HDA Intel PCH, ALC3661 Digital IEC958 (S/PDIF) Digital Audio Output 6. I run, as suggested: arecord -D iec958:CARD=PCH -f dat -v test.wav Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo Hooks PCM Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 24000 period_size : 6000 period_time : 125000 tstamp_mode : NONE period_step : 1 avail_min : 6000 period_event : 0 start_threshold : 1 stop_threshold : 24000 silence_threshold: 0 silence_size : 0 boundary : 6755399441055744000 Slave: Hardware PCM card 1 'HDA Intel PCH' device 1 subdevice 0 Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 24000 period_size : 6000 period_time : 125000 tstamp_mode : NONE period_step : 1 avail_min : 6000 period_event : 0 start_threshold : 1 stop_threshold : 24000 silence_threshold: 0 silence_size : 0 boundary : 6755399441055744000 appl_ptr : 0 hw_ptr : 0 But I get only silence, I tried to first attach the HDMI + switch to the video and start recording when everything is connected (i.e. when I would hear audio in Windows). I also tried to just record with the HDMI-cable connected and audio coming in (but not switched to video - in this case, I would hear nothing in Windows, but the audio should still arrive). Both cases, I record just silence. Any further ideas? Thanks a lot for your assistance!

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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

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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.