[pulseaudio-tickets] [Bug 39982] Cannot use internal Mic on Lenovo T500

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39982

--- Comment #9 from Colin Guthrie <fdo at colin.guthr.ie> 2011-08-12 03:55:09 PDT ---
Yeah the option should appear on the input tab. When you select that input a
combo box should offer you the choice of Internal, Mic or Docking (and in
theory this should be automatically selected, but... well, this doesn't quite
happen yet).

Anyway, I think the problem is at the alsa level... the Internal Mic and
Docking Mic simple elements only have volumes, not cvolumes, thus they cannot
be used to controlling the volume of recording.

This smells very much like an alsa issue. I would post this over to the
alsa-devel mailing list (a link to your alsa-info.sh output is useful) and ask
why your mics do not have cvolumes. They should be able to help you.

Feel free to leave this bug open and post links to the thread etc. as it'll
help other people on searching for this topic should they find it.

There is also a chance that you can play with the model= argument for your
chipset. While your specific codec is not mentioned, perhaps some of the models
are still valid... see the Conexant ones here:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt

Simply put "option snd-hda-intel model=foooooo" into a file in
/etc/modprobe.d/*.conf and then reboot.

Your amixer should change and you may find one that works.

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