[alsa-devel] Clevo P170HM / Sager NP8170 audio

Julian Sikorski belegdol at gmail.com
Thu Nov 24 10:20:46 CET 2011

W dniu 20.08.2011 09:33, Andrew Mahone pisze:
> This laptop is detected as ALC892 audio (and by the codec ID this
> seems to be valid), but none of the configurations for it quite match
> this device. I've been working on documenting the connections with HDA
> Analyzer.
> alsa-info output:
> http://www.alsa-project.org/db/?f=b86e4c6447867fbd129a36d8a63e2f5caa836c52
> The laptop has built-in 5.1, and 5.1 or 7.1 output via jacks.
> 0x02 front
> 0x03 rear
> 0x04 clfe
> 0x05 side
> internal mixers:
> 0x0c front
> 0x0d rear
> 0x0e clfe
> 0x0f side
> internal speaker pins:
> 0x14 front
> 0x15 "rear" (front of laptop)
> 0x16 clfe
> external ports:
> fixed route:
> 0x17 side
> can select any output:
> 0x18 mic / output
> 0x1a line-in / output
> 0x1b headphone
> I've been experimenting with patch_realtek.c to add the extra DAC NID,
> and have had some success with a 6-channel mode for the built-in
> speakers and an 8-channel mode that mutes all internal speakers and
> sets the jacks up for output. I still need to manually connect pins
> 0x18, 0x1a, 0x1b to the correct internal mixers for 7.1 to work, and
> headphone plugin does not mute internal speakers in 5.1 mode. I have
> not added a plain stereo mode for internal speakers, although it
> appears that i can probably configure the codec to mix the front
> channels to center and LFE.
> Are there any suggestions for what to do next? My current state as a
> patch against the linux-3.0.y repository is at
> http://pastie.org/2400649
I tried this patch (attached a version ported to 3.1.x kernel) with
P150HM and I was still unable to get sound out of the subwoofer when on
6 channel mode, could nonexisting rear be interfering?
As Andrew said, 8 channel mode works once you manually unmute and
reattach mixers using hda-analyzer.

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