[alsa-devel] [PATCH] Enable loudspeakers in ALC889 for Acers and others

[ruben at ugr.es]

Hi all

I managed to get sound working on my acer 6935, which has an ALC889 driven
by the intel_hda driver
The lack of sound seems to appear in other laptops as well.

The bug report is at
 https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4261

I know Takashi Iwai is familiar with the problems, since I used his
workaround with hda-verb to get it working initially, so if he is free and
wants to get this fixed, I'd be grateful (if anybody else can have a look,
that'd be great as well).

The patch is very easy (you can download it at the url above).
I added
snd_hda_codec_write(codec, 0x15, 0, AC_VERB_SET_EAPD_BTLENABLE, 2);
at the end of patch_alc883 before the return.

Please check whether there is a problem with other models; in that case a
new patch_alc889 which calls patch_alc883 plus the line can be added, or
more detailed checks on the pci ids can be done.

Thanks for your time.
Ruben