[alsa-devel] Acer Aspire 8920g / snd-hda-intel / ALC889
tiwai at suse.de
Fri Apr 25 14:29:44 CEST 2008
At Wed, 23 Apr 2008 22:10:45 +0100,
Andy Green wrote:
> Somebody in the thread at some point said:
> >> Hm, then the problem is somewhere different.
> >> You hear neither from speaker nor HP-jack?
> > Nothing, despite changing settings "headphone" and "IEC958" in alsamixer
> > -c0 (alsamixer by itself picks up pulseaudio nowadays apparently). It's
> > as if the amp is powered down, or we route everything to modem :-)
> Just some derisory extra information, external mic jack is working fine
> (and has bias voltage), Line-jack is also OK, but built-in mic is dead
> with some very small noise, maybe it is not given bias. If the issue
> was basically power management enabling, it could make sense.
> I saw realtek are pretty good with their datasheets, but there is none
> for ALC889 in their ftp site that has the rest.
> I also recompiled alsa 1.0.16 for grins but it didn't make any change.
> I looked in alsa-kernel/pci/hda/patch_realtek.c and enabled
> SND_CONFIG_DEBUG and SND_CONFIG_VERBOSE_PRINTK because there seemed to
> be some extra features generated then for ALC device GPIO pin control.
> But they didn't turn up in alsamixer. Do you know if there is an
> existing way to meddle with GPIO controls on ALC889 from inside ALSA easily?
Build CONFIG_SND_HDA_HWDEP=y and you'll have /dev/snd/hwC0D0 device.
With the hda-verb program in the URL below, you can exec the verb on
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