我正在尝试在嵌入式板上设置 A2DP+HFP 配置文件。目标是使用pulseaudio 12.2、ofono 1.18 和bluez 5.41 以便连接到手机并在必要时自动使用A2DP、HFP 配置文件。我做了很多很多事情来更新版本和配置守护进程。现在我可以看到连接后 HFP 配置文件可用。
A2DP 工作完美，我能够将音乐从手机传输到嵌入式板。当我接到电话时，我可以通过蓝牙接听，并且在我通话时看起来 HFP 是活动配置文件。奇怪的是，嵌入式板（连接到它的 HDMI 显示器）没有音频。
下面将向您展示它的样子。当我通过 A2DP 从手机流式传输音乐时，我得到以下来源和接收器：
pactl list short sinks
0 alsa_output.hw_1_0 module-alsa-sink.c s16le 2ch 48000Hz SUSPENDED
1 alsa_output.platform-sound.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
2 alsa_output.platform-sound-hdmi.stereo-fallback module-alsa-card.c s16le 2ch 48000Hz RUNNING
pactl list short sources
0 alsa_output.hw_1_0.monitor module-alsa-sink.c s16le 2ch 48000Hz SUSPENDED
1 alsa_output.platform-sound.analog-mono.monitor module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
2 alsa_input.platform-sound.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
3 alsa_output.platform-sound-hdmi.stereo-fallback.monitor module-alsa-card.c s16le 2ch 48000Hz IDLE
5 bluez_source.D8_5B_2A_5B_7B_E6.a2dp_source module-bluez5-device.c s16le 2ch 44100Hz RUNNING
每当我通话时（使用 HFP），我都会收到以下来源和接收器：
pactl list short sources
0 alsa_output.hw_1_0.monitor module-alsa-sink.c s16le 2ch 48000Hz SUSPENDED
1 alsa_output.platform-sound.analog-mono.monitor module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
2 alsa_input.platform-sound.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
3 alsa_output.platform-sound-hdmi.stereo-fallback.monitor module-alsa-card.c s16le 2ch 48000Hz SUSPENDED
7 bluez_sink.D8_5B_2A_5B_7B_E6.headset_audio_gateway.monitor module-bluez5-device.c s16le 1ch 8000Hz IDLE
8 bluez_source.D8_5B_2A_5B_7B_E6.headset_audio_gateway module-bluez5-device.c s16le 1ch 8000Hz RUNNING
pactl list short sinks
0 alsa_output.hw_1_0 module-alsa-sink.c s16le 2ch 48000Hz SUSPENDED
1 alsa_output.platform-sound.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
2 alsa_output.platform-sound-hdmi.stereo-fallback module-alsa-card.c s16le 2ch 48000Hz SUSPENDED
3 bluez_sink.D8_5B_2A_5B_7B_E6.headset_audio_gateway module-bluez5-device.c s16le 1ch 8000Hz RUNNING
这很奇怪，因为每当我通话时，接收器就会从我的 HDMI 显示器更改为蓝牙设备本身。请/etc/pulse/default.pa在下面找到我的：
.fail
### Automatically restore the volume of streams and devices
load-module module-device-restore
load-module module-stream-restore
load-module module-card-restore
### Automatically augment property information from .desktop files
### stored in /usr/share/application
load-module module-augment-properties
### Should be after module-*-restore but before module-*-detect
load-module module-switch-on-port-available
### Load audio drivers statically
### (it's probably better to not load these drivers manually, but instead
### use module-udev-detect -- see below -- for doing this automatically)
load-module module-alsa-sink device=hw:1,0
#load-module module-alsa-source
#load-module module-oss device="/dev/dsp" sink_name=output source_name=input
#load-module module-oss-mmap device="/dev/dsp" sink_name=output source_name=input
#load-module module-null-sink
#load-module module-pipe-sink
### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect
.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
.endif
### Automatically connect sink and source if JACK server is present
.ifexists module-jackdbus-detect.so
.nofail
load-module module-jackdbus-detect channels=2
.fail
.endif
### Automatically load driver modules for Bluetooth hardware
.ifexists module-bluetooth-policy.so
load-module module-bluetooth-policy ag=true auto_switch=2
.endif
.ifexists module-bluetooth-discover.so
load-module module-bluetooth-discover headset=auto
.endif
### Load several protocols
.ifexists module-esound-protocol-unix.so
load-module module-esound-protocol-unix
.endif
load-module module-native-protocol-unix auth-anonymous=1
### Network access (may be configured with paprefs, so leave this commented
### here if you plan to use paprefs)
#load-module module-esound-protocol-tcp
#load-module module-native-protocol-tcp
#load-module module-zeroconf-publish
### Load the RTP receiver module (also configured via paprefs, see above)
#load-module module-rtp-recv
### Load the RTP sender module (also configured via paprefs, see above)
#load-module module-null-sink sink_name=rtp format=s16be channels=2 rate=44100 sink_properties="device.description='RTP Multicast Sink'"
#load-module module-rtp-send source=rtp.monitor
### Load additional modules from GConf settings. This can be configured with the paprefs tool.
### Please keep in mind that the modules configured by paprefs might conflict with manually
### loaded modules.
.ifexists module-gconf.so
.nofail
load-module module-gconf
.fail
.endif
### Automatically restore the default sink/source when changed by the user
### during runtime
### NOTE: This should be loaded as early as possible so that subsequent modules
### that look up the default sink/source get the right value
load-module module-default-device-restore
### Automatically move streams to the default sink if the sink they are
### connected to dies, similar for sources
load-module module-rescue-streams
### Make sure we always have a sink around, even if it is a null sink.
load-module module-always-sink
### Honour intended role device property
load-module module-intended-roles
### Automatically suspend sinks/sources that become idle for too long
load-module module-suspend-on-idle
### If autoexit on idle is enabled we want to make sure we only quit
### when no local session needs us anymore.
.ifexists module-console-kit.so
load-module module-console-kit
.endif
.ifexists module-systemd-login.so
load-module module-systemd-login
.endif
### Enable positioned event sounds
load-module module-position-event-sounds
### Cork music/video streams when a phone stream is active
load-module module-role-cork
### Modules to allow autoloading of filters (such as echo cancellation)
### on demand. module-filter-heuristics tries to determine what filters
### make sense, and module-filter-apply does the heavy-lifting of
### loading modules and rerouting streams.
load-module module-filter-heuristics
load-module module-filter-apply
load-module module-switch-on-connect
### Make some devices default
# Make HDMI default
set-default-sink 0
#set-default-source input
以下是我的.asoundrcALSA配置（默认为HDMI设备）：
pcm.!default {
type hw
card 1
device 0
}