[pulseaudio-discuss] How to launch pulseaudio on embedded system

[Tanu Kaskinen]

On Tue, 2014-09-02 at 15:17 +0200, DIEHCO R&D wrote:
> Le 02/09/2014 12:35, Tanu Kaskinen a écrit :
> > On Tue, 2014-09-02 at 11:24 +0200, DIEHCO R&D wrote:
> >> Le 02/09/2014 10:57, Tanu Kaskinen a écrit :
> >>>>>> (...)
> >>>>>> I: [pulseaudio] module-udev-detect.c: Found 0 cards.
> >>>>> The debug logs before this line should tell why there weren't any sound
> >>>>> cards found.
> >>>> module-udev-detect.so found. I don't see if there is problem in log below.
> >>> Ok, so according to udev there are no sound devices. What does "ls
> >>> -l /dev/snd" print?
> >>>
> >> root at eukrea-cpuimx25:~# ls -l /dev/snd
> >> crw-rw----    1 root     root      116,   0 Sep  2 09:13 controlC0
> >> crw-rw----    1 root     root      116,  24 Sep  2 09:13 pcmC0D0c
> >> crw-rw----    1 root     root      116,  16 Sep  2 09:13 pcmC0D0p
> >> crw-rw----    1 root     root      116,   1 Sep  2 09:13 seq
> >> crw-rw----    1 root     root      116,  33 Sep  2 09:13 timer
> > Hmm, pulseaudio probably can't use these devices, because they are
> > accessible only to root and pulseaudio runs under the "pulse" user, so
> > modifying the access rights is required, but I think the log indicates
> > that pulseaudio doesn't even try, because according to udev there are no
> > sound cards.
> >
> > What does "udevadm info /dev/snd/controlC0" print?
> root at eukrea-cpuimx25:~# udevadm info /dev/snd/controlC0
> missing option
> root at eukrea-cpuimx25:~# udevadm info --query=all --name=/dev/snd/controlC0
> P: /devices/platform/soc-audio/sound/card0/controlC0
> N: snd/controlC0
> E: DEVNAME=/dev/snd/controlC0
> E: DEVPATH=/devices/platform/soc-audio/sound/card0/controlC0
> E: MAJOR=116
> E: MINOR=0
> E: SUBSYSTEM=sound

Looks good to me. Can you also paste the output of

    udevadm info --query=all /sys/devices/platform/soc-audio/sound/card0

If that also looks good, then I'm out of ideas.

> >> and see attached the "pulseaudio --system -vvvv &" and "pactl list
> >> cards" outputs with the lines:
> >> W: [pulseaudio] protocol-native.c: Denied access to client with invalid
> >> authorization data.
> >> Connection failure: Access denied
> > Add the user to the "pulse-access" group, or pass "auth-anonymous=true"
> > to module-native-protocol-unix in /etc/pulse/system.pa to allow any user
> > to access the server.
> >
> I use second way and then :
> root at eukrea-cpuimx25:~# pactl list cards
> I: [pulseaudio] client.c: Created 0 "Native client (UNIX socket client)"
> I: [pulseaudio] protocol-native.c: Client authenticated anonymously.
> D: [pulseaudio] protocol-native.c: Protocol version: remote 29, local 29
> D: [pulseaudio] protocol-native.c: SHM possible: no
> D: [pulseaudio] protocol-native.c: Negotiated SHM: no
> I: [pulseaudio] client.c: Freed 0 "pactl"
> I: [pulseaudio] protocol-native.c: Connection died.
> 
> (pulseaudio still running)

This is the expected behaviour, given that there are no sound cards.

-- 
Tanu