[SOLVED] Raspberry Pi3, Alsa, Slackarm.14.2

Hi,
i'm in trouble getting sound to work on a RaspberryPi 3 running slackarm 14.2.

> lsmod |grep snd snd_bcm2835 20319 0 snd_pcm 75532 1 snd_bcm2835 snd_timer 19156 1 snd_pcm snd 52074 3 snd_bcm2835,snd_timer,snd_pcm

...module is loaded via rc.local, it didn't load by default.

...starting alsa manually:

> /etc/rc.d/rc.alsa restart Setting default ALSA mixer settings. amixer: Mixer attach default error: No such file or directory Storing default ALSA mixer settings: /usr/sbin/alsactl store /usr/sbin/alsactl: save_state:1595: No soundcards found...

so let's have closer look:

~> cat /proc/asound/cards --- no soundcards ---

Hu?

alsamixer tells the same, no device...
and

aplay -L null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server

Which brings me to the question: where is pulse started? rc.pulseaudio is not executable and the belonging section in rc.M is excluded. Udev? I didn' find anything looking like a rule to start pulseaudio. But:

> ps ax|grep pulse 2186 pts/0 S+ 0:00 grep pulse

doesn't show anything of pulse. So why is pulseaudio be shown?

So my goal is simply to run alsa (not pulse) and use 3,5 jack. But first of all: getting alsa to run.

Are there any ideas?

thanks in advance

First of all: i wasn't aware of slackware14.2 being shipped with pulseaudio as default.

To get the soundcard (slackarm only):
Set at /boot/config.txt

dtparam=audio=on

and, solely to set 3.5mm jack as default:

hdmi_drive=1

Next, the module of the soundcard has to be loaded:
append to /etc/rc.d/rc.local

modprobe snd_bcm2835

...but there are other places to load it.

That was the raspberry part. To get back alsa to slackware, do the following:

Prevent audio from being routed by default to pulse, this happens at /etc/asound.conf:

mv /etc/asound.conf /etc/asound.conf.bak

Prevent pulseaudio from being started again, when killed, edit /etc/pulse/client.conf to the following:

autospawn = no allow-autospawn-for-root = no daemon-binary = /usr/bin/true

revoke executionflag on /etc/rc.d/rc.pulseaudio

chmod 444 /etc/rc.d/rc.pulseaudio

make /etc/rc.d/rc.alsa executable:

chmod 544 /etc/rc.d/rc.alsa

For the slackware part of getting rid of pulseaudio, there are some more threads about it here on LQ.