[alsa-devel] mic on macbook air

Takashi Iwai tiwai at suse.de
Mon Sep 27 16:39:11 CEST 2010

At Mon, 27 Sep 2010 00:32:03 +0200,
Reimundo wrote:
> Hello list, from time to time I spend some time trying to get the mic
> working on a Macbook air 2,1. I tried looking at the relevant info from
> the corresponding kernel extensions on mac os X. The codec has  "Vendor
> Id: 0x10ec0885" so the relevant part of the info.plist on mac os X reads
> <dict>
> <key>MicAttributes</key>
> <integer>28</integer>
> <key>MicInfo</key>
> <string>Sampled on rising edge</string>
> <key>NodeID</key>
> <integer>39</integer>
> <key>PinConfigDefault</key>
> <integer>2426405136</integer>
> </dict>
> Which tells me nothing. In particular I don't have a node 0x27=39 (at
> least not that hda-analyzer sees) so it's not surprising that if I send
> the corresponding verbs to set_config_default I don't get anything.
> Also, I don't see how setting the pinconfigdefault could affect my not
> having the mic working (anyway I tried setting those pinconfigdefaults
> that put the node as a fixed mic on all nids 0x19-0x1c to no avail)
> As for the sampled on rising edge, I don't know how to use this info.
> any ideas?

Justin Mattock made once some patches for MacBookAir, but they are
pending because no one tested yet.

Justin, could you repost the patches (rebase if needed) for testing



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