Re: [gentoo-user] Re: ALSA - Still No Sound

[Mick <michaelkintzios@gmail.com>]

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On Sunday 06 March 2011 00:29:59 dhk wrote:
> On 02/26/2011 04:53 PM, walt wrote:
> > On 02/15/2011 02:43 AM, dhk wrote:
> >> On 02/14/2011 12:29 PM, walt wrote:
> >>> On 02/14/2011 03:43 AM, dhk wrote:
> >>>> What are the "Intel HD Audio" codecs?  I don't
> >>>> remember doing anything explicitly for them.  How do I check them?
> >>>> Thanks.
> >>> 
> >>> Under the HD-Intel sound card driver menu there are several codecs for
> >>> specific sound chips.  e.g. I use the one for realtek, but yours may be
> >>> a different one.  Doesn't hurt to build them all as modules and see
> >>> which
> >>> one(s) your kernel actually uses.
> >> 
> >> It looks like all the codec's are built in.  I'm not sure what the last
> >> one in the list does.
> >> 
> >> # grep -i realtek /etc/kernels/kernel-config-x86_64-2.6.36-gentoo-r5
> >> CONFIG_REALTEK_PHY=m
> >> CONFIG_SND_HDA_CODEC_REALTEK=y
> >> # grep -i codec /etc/kernels/kernel-config-x86_64-2.6.36-gentoo-r5
> >> CONFIG_SND_AC97_CODEC=m
> >> CONFIG_SND_HDA_CODEC_REALTEK=y
> >> CONFIG_SND_HDA_CODEC_ANALOG=y
> >> CONFIG_SND_HDA_CODEC_SIGMATEL=y
> >> CONFIG_SND_HDA_CODEC_VIA=y
> >> CONFIG_SND_HDA_CODEC_ATIHDMI=y
> >> CONFIG_SND_HDA_CODEC_NVHDMI=y
> >> CONFIG_SND_HDA_CODEC_INTELHDMI=y
> >> CONFIG_SND_HDA_CODEC_CIRRUS=y
> >> CONFIG_SND_HDA_CODEC_CONEXANT=y
> >> CONFIG_SND_HDA_CODEC_CA0110=y
> >> CONFIG_SND_HDA_CODEC_CMEDIA=y
> >> CONFIG_SND_HDA_CODEC_SI3054=y
> >> # CONFIG_SND_SOC_ALL_CODECS is not set
> >> 
> >> This is the genkernel so pretty much everything is built in.
> > 
> > There is a very recent post from someone (Walter?) that says he got audio
> > only after compiling all the kernel sound features as modules, but he has
> > no idea why (nor do I) but, as no one yet has a better idea, I'd try it
> > as an experiment.
> 
> This probably won't make any sense, but for some reason I had good clear
> sound for a few minutes today.  Since I've been working on other things
> and audio is a luxury for me I haven't been trying to get it to work
> lately.  However, this afternoon I plugged in the speaker and tried a
> wave file and it played great.  Then, since the machine has been running
> a for a while and I've done updates recently, I rebooted to have a clean
> start.  I though it might get rid of the bouncing vertical scrollbar,
> but that's another issue.  I was all set to play music and videos, but
> after the reboot the audio wasn't working anymore.  Something somewhere
> got the audio working only for it to stop after a reboot.  I checked
> alsasound and it's running.  Any ideas?

Did you check with alsamixer to see if Main or PCM or anything else has been 
muted?

PS.  I seem to recall on a dell machine where the sound would be muted 
inexplicably (I believe due to some hardware setting) that dual booting into 
MSWindows would fix it (i.e. unmute it).  As the alsa drivers were developed 
further this problem disappeared a few months later.
-- 
Regards,
Mick

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