我正在使用 Ubuntu 20.04.3 LTS，并尝试将我的 Pixel Buds A 系列用作耳机。它作为音频接收器/耳机工作得很好，但我无法将配置文件切换为“耳机”（以便让麦克风工作）
它检测到配置文件 a2dp_sink 和 headphone_head_unit，但后者显示“avaliable:no”
当我尝试将配置文件切换到headset_head_unit时：
pactl set-card-profile 24 headset_head_unit
我得到：
Failure: Input/Output error
以下是pactl的输出（个人信息替换为xxxx）
pactl 列表
Card #24
Name: bluez_card.xxxxxx
Driver: module-bluez5-device.c
Owner Module: 51
Properties:
device.description = "xxxxx Pixel Buds A-Series"
device.string = "xxxxxx"
device.api = "bluez"
device.class = "sound"
device.bus = "bluetooth"
device.form_factor = "headset"
bluez.path = "/org/bluez/hci0/dev_xxxxx"
bluez.class = "0x240404"
bluez.alias = "xxx's Pixel Buds A-Series"
device.icon_name = "audio-headset-bluetooth"
device.intended_roles = "phone"
Profiles:
a2dp_sink: High Fidelity Playback (A2DP Sink) (sinks: 1, sources: 0, priority: 40, available: yes)
headset_head_unit: Headset Head Unit (HSP/HFP) (sinks: 1, sources: 1, priority: 30, available: no)
off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
Active Profile: a2dp_sink
Ports:
headset-output: Headset (priority: 0, latency offset: 0 usec, available)
Part of profile(s): a2dp_sink, headset_head_unit
headset-input: Headset (priority: 0, latency offset: 0 usec, not available)
Part of profile(s): headset_head_unit