我有一台索尼 WH-CH700N 蓝牙耳机。在我之前的 Ubuntu 上，它运行得很好。现在我使用另一台装有 Kubuntu 的笔记本电脑，却无法使用它。
它立即被检测到。奇怪的是，我无法选择音频配置文件。此外，我无法在“设置”中执行任何有意义的操作（它只是说配置成功）。
它还可以从设备获取以下信息：
耳机通常会发出“蓝牙连接”的音频反馈，但事实并非如此。
我开始学习如何使用 pipwire 的教程（https://askubuntu.com/a/1339897/363916）
我已经成功安装了 pipewire。在一些教程中，需要重新启动 pulse，但什么也没发生。重新启动 pipewire 会中断播放的声音并提供视觉反馈。另外：
$ pactl info
Server String: /run/user/1767016071/pulse/native
Library Protocol Version: 33
Server Protocol Version: 35
Is Local: yes
Client Index: 79
Tile Size: 65472
User Name: qohelet
Host Name: hpbook-linux
Server Name: PulseAudio (on PipeWire 0.3.40)
Server Version: 15.0.0
Default Sample Specification: float32le 2ch 48000Hz
Default Channel Map: front-left,front-right
Default Sink: alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink
Default Source: alsa_input.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__source
Cookie: 79ad:c27f
奇怪的是，也没有合适的个人资料：
当我尝试连接耳机时，看起来有点不对劲：
$ sudo tail -f /var/log/syslog
Dec 1 10:18:22 hpbook-linux sssd_pac[12411]: Starting up
Dec 1 10:18:22 hpbook-linux krb5_child[12407]: Preauthentication failed
Dec 1 10:18:22 hpbook-linux krb5_child[12407]: message repeated 2 times: [ Preauthentication failed]
Dec 1 10:18:28 hpbook-linux kernel: [ 4248.095541] audit: type=1400 audit(1638350308.723:889): apparmor="ALLOWED" operation="open" profile="/usr/sbin/sssd" name="/run/systemd/users/1767016071" pid=12418 comm="krb5_child" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
Dec 1 10:18:29 hpbook-linux wpa_supplicant[1007]: wlp0s20f3: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-61 noise=9999 txrate=144400
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: message repeated 2 times: [ kde.dbusmenuproxy: Updating existing section 1 in subscription 2]
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 0 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 0 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: message repeated 4 times: [ kde.dbusmenuproxy: Updating existing section 1 in subscription 2]
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 0 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: message repeated 2 times: [ kde.dbusmenuproxy: Updating existing section 1 in subscription 2]
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: QDBusSignature: invalid signature ""
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Cannot get action 2 1 3 which is out of bounds
Dec 1 10:18:33 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Cannot get action 2 1 2 which is out of bounds
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[12370]: blueman-manager 10.18.35 WARNING DeviceList:193 monitor_power_levels: Failed to get power levels, probably a LE device.
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 1 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: message repeated 6 times: [ kde.dbusmenuproxy: Updating existing section 1 in subscription 2]
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 0 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Creating new section 5 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 0 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Creating new section 6 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 6 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: message repeated 2 times: [ kde.dbusmenuproxy: Updating existing section 6 in subscription 2]
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Updating existing section 0 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: kde.dbusmenuproxy: Creating new section 7 in subscription 2
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: QDBusSignature: invalid signature ""
Dec 1 10:18:35 hpbook-linux /usr/lib/gdm3/gdm-x-session[2419]: message repeated 9 times: [ QDBusSignature: invalid signature ""]
Dec 1 10:18:39 hpbook-linux wpa_supplicant[1007]: wlp0s20f3: CTRL-EVENT-BEACON-LOSS
但尽管已“连接”，一段时间后它就会自动关闭。
我不明白的是，一些指南建议安装 ofono，而 pipewire 似乎不喜欢 ofono。
我知道这（不幸的是）在 Linux 下是一个相当常见的问题。但我做了一些进一步的研究，想知道 20.04 中的 bluez-firmware 发生了什么？
$ sudo apt-get install bluez-firmware
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package bluez-firmware
编辑(1)：我之所以想要安装它是因为我认为我的蓝牙出了问题：
lsusb | grep Bluetooth
不返回任何内容。
另一方面，服务正在运行：
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2021-12-01 10:45:55 CET; 23min ago
Docs: man:bluetoothd(8)
Main PID: 1113 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 18834)
Memory: 2.5M
CGroup: /system.slice/bluetooth.service
└─1113 /usr/lib/bluetooth/bluetoothd
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSink/sbc
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/sbc
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSink/sbc_xq
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/sbc_xq
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/faststream
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/faststream_duplex
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/aptx_ll_1
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/aptx_ll_0
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/aptx_ll_duplex_1
Dez 01 10:46:09 innb02781-linux bluetoothd[1113]: Endpoint registered: sender=:1.80 path=/MediaEndpoint/A2DPSource/aptx_ll_duplex_0
编辑（2）： 我拥有的 WiFi 芯片可能也相关：$ sudo lshw -C network *-network
描述：无线接口产品：Wireless-AC 9462 供应商：Intel Corporation 物理 ID：14.3 总线信息：pci@0000:00:14.3 逻辑名称：wlp0s20f3 版本：00 序列号：84：5c：f3：8e：45：13 宽度：64 位时钟：33MHz 功能：pm msi pciexpress msix bus_master cap_list 以太网物理无线配置：broadcast=yes driver=iwlwifi driverversion=5.10.0-1051-oem firmware=59.601f3a66.0 QuZ-a0-hr-b0-59.u ip=10.0.0.21 Latency=0 link=yes multicast=yes wireless=IEEE 802.11 资源：irq：16内存：e0110000-e0113fff
所以我去了https://www.intel.de/content/www/de/de/support/articles/000005511/wireless.html并下载iwlwifi-9000-pu-b0-jf-b0-34.618819.0.tgz并将文件移动到/lib/firmware。
也没有阻塞：
$ sudo rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
我也尝试过关闭 wifi 并连接。没什么区别。
尝试了很多次后，我甚至无法再配对。但多亏了（https://unix.stackexchange.com/a/293967/115043）我可以再做一次。但是，仍然没有音频连接。
在命令行中与 bluetoothctl 配对时，我得到以下信息：
$ bluetoothctl
Agent registered
[bluetooth]# trust 94:DB:56:AA:85:89
Changing 94:DB:56:AA:85:89 trust succeeded
[bluetooth]# pair 94:DB:56:AA:85:89
Attempting to pair with 94:DB:56:AA:85:89
[CHG] Device 94:DB:56:AA:85:89 Connected: yes
[CHG] Device 94:DB:56:AA:85:89 Name: LE_WH-CH700N
[CHG] Device 94:DB:56:AA:85:89 Alias: LE_WH-CH700N
[NEW] Primary Service (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0001
00001801-0000-1000-8000-00805f9b34fb
Generic Attribute Profile
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0001/char0002
00002a05-0000-1000-8000-00805f9b34fb
Service Changed
[NEW] Descriptor (Handle 0xf6d4)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0001/char0002/desc0004
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Primary Service (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a
69a7f243-e52f-4443-a7f9-cb4d053c74d6
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a/char000b
be8692b1-3b29-410d-94d3-50281940553e
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a/char000d
3f92019d-ac1d-48dc-9d94-86a0fb507591
Vendor specific
[NEW] Descriptor (Handle 0x5e44)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a/char000d/desc000f
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a/char0010
5bc06a57-f84d-4086-a65a-2a238cb39cdb
Vendor specific
[NEW] Descriptor (Handle 0x64b4)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a/char0010/desc0012
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service000a/char0013
99c3f043-8431-40e9-9802-850114e4c0d1
Vendor specific
[NEW] Primary Service (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015
fe59bfa8-7fe3-4a05-9d94-99fadc69faff
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char0016
104c022e-48d6-4dd2-8737-f8ac5489c5d4
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char0018
69745240-ec29-4899-a2a8-cf78fd214303
Vendor specific
[NEW] Descriptor (Handle 0x73b4)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char0018/desc001a
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4a8d)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char001b
70efdf00-4375-4a9e-912d-63522566d947
Vendor specific
[NEW] Descriptor (Handle 0x82b4)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char001b/desc001d
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char001e
eea2e8a0-89f0-4985-a1e2-d91dc4a52632
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0015/char0020
a79e2bd1-d6e4-4d1e-8b4f-141d69011cbb
Vendor specific
[NEW] Primary Service (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022
91c10d9c-aaef-42bd-b6d6-8a648c19213d
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char0023
99d1064e-4517-46aa-8fb4-6be64dd1a1f1
Vendor specific
[NEW] Descriptor (Handle 0x9994)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char0023/desc0025
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char0026
fbe87f6c-3f1a-44b6-b577-0bac731f6e85
Vendor specific
[NEW] Descriptor (Handle 0x9fd4)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char0026/desc0028
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char0029
420791c0-bff5-4bd1-b957-371614031136
Vendor specific
[NEW] Descriptor (Handle 0xa614)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char0029/desc002b
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char002c
e4ef5a46-30f9-4287-a3e7-643066acb768
Vendor specific
[NEW] Descriptor (Handle 0xac54)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service0022/char002c/desc002e
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
[NEW] Primary Service (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service002f
0000fe03-0000-1000-8000-00805f9b34fb
Amazon.com Services, Inc.
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service002f/char0030
f04eb177-3005-43a7-ac61-a390ddf83076
Vendor specific
[NEW] Characteristic (Handle 0x4461)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service002f/char0032
2beea05b-1879-4bb4-8a2f-72641f82420b
Vendor specific
[NEW] Descriptor (Handle 0xc724)
/org/bluez/hci0/dev_94_DB_56_AA_85_89/service002f/char0032/desc0034
00002902-0000-1000-8000-00805f9b34fb
Client Characteristic Configuration
编辑（3）：我在 Alsa 上上传了我的系统信息： http://alsa-project.org/db/?f=bef1ab7988c496cd50cce59779ad3135a5fa0079
编辑 (4)：我尝试使用蓝牙适配器而不是内置蓝牙。同样没有成功。这让我相信这是一个与软件相关的错误。我已经从源代码安装了最新的 bluez 版本。我无法编译 blueman，所以我使用了 apt 中的版本。