bluealsa: E: Couldn't obtain D-Bus connection: Could not connect: No such file or directory

解決方案：

export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/opt/bluez/var/run/dbus/system_bus_socket

bluealsa: W: Couldn't create storage directory: No such file or directory

解決方案：

mkdir -p /opt/bluez-alsa/var/lib/bluealsa

 

bluealsa: W: Couldn't get managed objects: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.bluez was not provided by any .service files

解決方案：

先啟動藍牙服務（bluetoothd和obexd），hciconfig hci0 up，然後再啟動bluealsa。

報這個錯說明藍牙服務都沒啟動，就嘗試啟動bluealsa。

[root@luckfox-rv1106 /]# LD_LIBRARY_PATH=/opt/bluez/lib:/opt/bluez-alsa/lib /opt
/bluez-alsa/bin/aplay -D bluealsa:SRV=hci0,DEV=DC:D8:7C:1E:CA:CD,PROFILE=a2dp /r
oot/music/wav/Sand.wav
ALSA lib pcm.c:2722:(snd_pcm_open_noupdate) Unknown PCM bluealsa:SRV=hci0,DEV=DC:D8:7C:1E:CA:CD,PROFILE=a2dp
aplay: main:850: audio open error: No such file or directory
[root@luckfox-rv1106 /]#

 

解決方案：

找到20-bluealsa.conf文件所在的文件夾：find /opt -name 20-bluealsa.conf
所在的文件夾是/opt/bluez-alsa/etc/alsa/conf.d。
修改/opt/bluez-alsa/share/alsa/alsa.conf文件，把這個文件夾添加到@hooks files數組裡面（加上雙引號）："/opt/bluez-alsa/etc/alsa/conf.d"。

[root@luckfox-rv1106 /opt/bluez-alsa/lib]# LD_LIBRARY_PATH=/opt/bluez-alsa/lib /
opt/bluez-alsa/bin/aplay -D bluealsa:SRV=hci0,DEV=DC:D8:7C:1E:CA:CD,PROFILE=a2dp
 /root/music/wav/Sand.wav
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_bluealsa.so (libdbus-1.so.3: cannot open shared object file: No such file or directory)
aplay: main:850: audio open error: No such device or address
[root@luckfox-rv1106 /opt/bluez-alsa/lib]#

 

解決方案：

將下面6個庫文件放到/opt/bluez-alsa/lib/alsa-lib/裡面。

libasound_module_ctl_bluealsa.a   libasound_module_pcm_bluealsa.a
libasound_module_ctl_bluealsa.la  libasound_module_pcm_bluealsa.la
libasound_module_ctl_bluealsa.so  libasound_module_pcm_bluealsa.so

dbus[372]: Unknown group "audio" in message bus configuration file
解決方案：執行addgroup -S audio命令添加一個名為audio的用戶組。