[Bluetooth] LibreELEC "mutes" SailfishOS devices

V10lator · May 30, 2016 at 7:12 PM

Today I tried to pair my Raspberry Pi 3 with my Jolla smartphone (running SailfishOS). As soon as the devices are connected SailfishOS routes all audio to the RPi but LibreELEC just seems to route it to trash. So the result is a completely muted phone and the only way to get audio back is to close the bluetooth connection.

Now I wonder why does LibreELEC advertise A2DP when it doesn't work? Or is this maybe just related to the RPi 3 and if so: Anything I could test?

**lrusak** · May 30, 2016 at 7:21 PM Official Post

We only support audio the other way by default, so RPi --> Bluetooth audio speaker, not the other way around. It is possible to make it work manually but we cannot make it the default for all devices.

V10lator · May 30, 2016 at 7:26 PM

Quote from lrusak

We only support audio the other way by default, so RPi --> Bluetooth audio speaker, not the other way around. It is possible to make it work manually but we cannot make it the default for all devices.

Any hint on how to do that? I see you're using bluetoothd but can't even find it's config files.

Also then the question still stands:

Quote from V10lator

I wonder why does LibreELEC advertise A2DP when it doesn't work?

It might be a really good idea to not advertise what you can't handle (a user making it work manually will re-add the advertising, too).

**lrusak** · May 30, 2016 at 7:30 PM Official Post

Quote from V10lator

Any hint on how to do that? I see you're using bluetoothd but can't even find it's config files.

Also then the question still stands:

It might be a really good idea to not advertise what you can't handle (a user making it work manually will re-add the advertising, too).

It's all been covered before
LibreELEC

V10lator · May 30, 2016 at 7:49 PM

Quote from lrusak

It's all been covered before
LibreELEC

Thanks, I tried that but stuck at pactl list short, there are no usable sources/sinks:

Code

LibreELEC:~ # pactl list short
0       module-native-protocol-unix
1       module-stream-restore
2       module-device-restore
3       module-default-device-restore
4       module-rescue-streams
5       module-always-sink
6       module-null-sink        sink_name=auto_null sink_properties='device.description="Dummy Output"'
7       module-suspend-on-idle
8       module-position-event-sounds
9       module-dbus-protocol
10      module-bluetooth-policy
11      module-bluetooth-discover
12      module-bluez5-discover
13      module-zeroconf-publish
14      module-native-protocol-tcp      auth-anonymous=1
15      module-switch-on-connect
17      module-udev-detect
0       auto_null       module-null-sink.c      s16le 2ch 44100Hz       SUSPENDED
0       auto_null.monitor       module-null-sink.c      s16le 2ch 44100Hz       SUSPENDED
9       protocol-native.c       pactl

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I guess I did everything correctly:

Code

LibreELEC:~ # lsmod
Module                  Size  Used by
snd_bcm2835            22554  0
snd_pcm                66018  1 snd_bcm2835
snd_timer              17428  1 snd_pcm
snd                    40540  3 snd_bcm2835,snd_timer,snd_pcm
hci_uart               14478  1
btbcm                   5379  1 hci_uart
bluetooth             282086  21 btbcm,hci_uart
brcmfmac              172683  0
brcmutil                4893  1 brcmfmac
cfg80211              229385  1 brcmfmac
bcm2835_gpiomem         2652  0
bcm2835_wdt             2777  0
LibreELEC:~ # ls /lib/modules/4.4.7/kernel/sound/arm/
snd-bcm2835.ko

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**lrusak** · May 30, 2016 at 8:53 PM Official Post

no idea really

Code

LibreELEC:~ # pactl load-module module-udev-detect
16

Code

LibreELEC:~ # pactl list short
0    module-native-protocol-unix        
1    module-stream-restore        
2    module-device-restore        
3    module-default-device-restore        
4    module-rescue-streams        
5    module-always-sink        
7    module-suspend-on-idle        
8    module-position-event-sounds        
9    module-dbus-protocol        
10    module-bluetooth-policy        
11    module-bluetooth-discover        
12    module-bluez5-discover        
13    module-zeroconf-publish        
14    module-native-protocol-tcp    auth-anonymous=1    
15    module-switch-on-connect        
16    module-udev-detect        
17    module-alsa-card    device_id="0" name="platform-audio" card_name="alsa_card.platform-audio" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1"    
18    module-bluez5-device    path=/org/bluez/hci0/dev_28_E1_4C_6A_9F_D5    
19    module-loopback    source="bluez_source.28_E1_4C_6A_9F_D5" source_dont_move="true" sink_input_properties="media.role=music"  
1    alsa_output.platform-audio.analog-stereo    module-alsa-card.c    s16le 2ch 44100Hz    SUSPENDED
1    alsa_output.platform-audio.analog-stereo.monitor    module-alsa-card.c    s16le 2ch 44100Hz    SUSPENDED
2    bluez_source.28_E1_4C_6A_9F_D5    module-bluez5-device.c    s16le 2ch 44100Hz    SUSPENDED
0    1    -    module-loopback.c    s16le 2ch 44100Hz
0    2    -    module-loopback.c    s16le 2ch 44100Hz
7    protocol-native.c    pactl
0    alsa_card.platform-audio    module-alsa-card.c
1    bluez_card.28_E1_4C_6A_9F_D5    module-bluez5-device.c

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Code

LibreELEC:~ # pactl set-default-sink alsa_output.platform-audio.analog-stereo
LibreELEC:~ # pactl set-default-source bluez_source.28_E1_4C_6A_9F_D5

Code

LibreELEC:~ # pactl info
Server String: /var/run/pulse/native
Library Protocol Version: 30
Server Protocol Version: 30
Is Local: yes
Client Index: 9
Tile Size: 65496
User Name: root
Host Name: LibreELEC
Server Name: pulseaudio
Server Version: 8.0
Default Sample Specification: s16le 2ch 44100Hz
Default Channel Map: front-left,front-right
Default Sink: alsa_output.platform-audio.analog-stereo
Default Source: bluez_source.28_E1_4C_6A_9F_D5
Cookie: 6bfa:6fb3

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Note that "alsa_output.platform-audio.analog-stereo" is actually my HDMI output

V10lator · May 30, 2016 at 9:01 PM

Quote from lrusak

no idea really
-- SNIP --

Seems like the driver isn't doing anything for me:

Code

LibreELEC:~ # aplay -l
aplay: device_list:268: no soundcards found...

So I thought maybe I need dtparam=audio=on but I can't do that (see this post for more information).

**lrusak** · May 30, 2016 at 9:02 PM Official Post

Quote from V10lator

So I thought maybe I need dtparam=audio=on

just put it in config.txt

Code

mount -o remount,rw /flash
nano /flash/config.txt

V10lator · May 30, 2016 at 9:21 PM

Quote from lrusak

just put it in config.txt

That worked, thanks! In fact everything works out of the box (except setting Kodi to use ALSA - yes ALSA as PulseAudio still needs tuning and either the RPi has hardware mixing capabilities or dmix is running) now without setting default sink/source. Anyway, PulseAudio doesn't perform good, I guess the place to tune it is /storage/.config/pulse-daemon.conf.d/ ? Does anyone know what sampling frequencys the chip supports?