[Jaunty] Patch to enable digital mics in alsa driver HDA intel (Realtek ALC268 Codec)

[Fred]

In Jaunty, digital mics on Acer laptops doesn't work.
There is a fix for that in Alsa 1.0.18a :
http://git.alsa-project.org/?p=alsa-kmirror.git;a=commit;h=2cc442715c45c88016c3c1c68e8828683d1b186a
This fix add a new model (acer-dmic) in Alsa HDA Intel driver for Realtek ALC268 codec, enabling digital mics on Acer laptops (and maybe other laptops). Current Realtek ALC268 implementation only works with analog mics.
The attached patch has been made against the package linux 2.6.28-8.24 : The original fix apply cleanly, I have only fix the offsets.
Risks for applying this patch are low : The worst case is that this new model doesn't work at all. But as you need to select this model by manually editing /etc/modprobe.d/alsa-base, it won't create regressions in any case.

[Fred (frederic-lespez)]

I rebuilded the linux package 2.6.28-8.24 with this patch and I can confirm it works.
First you need to add in /etc/modprobe.d/alsa-base the following line to select the new model:
options snd-hda-intel model=acer-dmic
Then after reloading snd-hda-intel module, the digital mic integrated into my laptop (Acer TM6292) works.

[Fred (frederic-lespez)]

Just to a quick update :
I check that the patch still cleanly applies on linux 2.6.28-8.25 package.

[Igor Zubarev (igor.zubarev)]

Confirm for Sony VAIO VGN-FS115MR See my output http://www.alsa-project.org/db/?f=c1c1c817cd688b90622c719d913bc7850264d7ec

[Fred (frederic-lespez)]

The patch still applies on linux package 2.6.28-11.37. I have updated it since the offset have changed.

Jaunty release date is approaching really fast now. Is there a chance to see this patch applied ?

[Fred (frederic-lespez)]

The patch still applies on linux package 2.6.28-11.37. I have updated it since the offset have changed.

Jaunty release date is approaching really fast now. Is there a chance to see this patch applied ?

[Manoj Iyer (manjo)]

The patch you mention is already in the Jaunty tree. Are you still seeing this issue ?

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c238b4f4038e0e49bb241640610584a088b268b1

[Fred (frederic-lespez)]

Hi,

This patch is not in Jaunty tree. I checked into 2.6.28-11.42 package's source : It's not there.

[Manoj Iyer (manjo)]

Can you please verify the kernel in

http://people.ubuntu.com/~manjo/lp332506-jaunty/

and report back here? I will get it SRU for jainty

[Fred (frederic-lespez)]

Hi Manoj,

I tested your kernel and it works fine. That's OK for me.
Thanks a lot for your work !

[Manoj Iyer (manjo)]

 jockey currently blacklists wl by default in favor of ssb (which supports the b44 ethernet driver), the wl driver was recently upgraded to version 5.10.91.9.

[Manoj Iyer (manjo)]

oops wrong bug. ignore the comment above.

Fred, thanks a ton for verifying the kernel. I have submitted for jaunty sru.

[Leann Ogasawara (leannogasawara)]

Hi Fred,

The patch noted here does seem to be in Karmic. Can you confirm this is resolved for Karmic? Thanks.

[Fred (frederic-lespez)]

I confirm the patch is in Karmic (since it includes Alsa 1.0.21).