我机器的蓝牙适配器是Intel AX200无线网卡板载的蓝牙适配器。一直都是用控制中心的升级功能进行系统升级，内核没有手动升级过，只跟随系统发布整体升级。目前是20.9版本。

发现自从升级了20.8以后，蓝牙功能就从消失了，无论是控制中心，还是blueman都找不到适配器，但是在Deepin 自带的“设备管理器“”中的“硬件“选项中，又能看到有蓝牙的硬件设备，而且“驱动”选项中也显示蓝牙驱动正常。

经过几次切换内核，发现5.15.34内核版本是在我的机器上是最后一个可以正常使用蓝牙功能的内核版本。 之后的5.15.45和5.15.77两个版本的内核，蓝牙功能都无法正常使用，控制中心也没有任何显示。现在为了使用蓝牙，都是降级内核版本在使用。

在论坛中看到可以通过“sudo apt install inxi -y && inxi -F && cat /etc/apt/sources.list /etc/apt/sources.list.d/*.list |grep -v ^#”命令反馈结果的做法。我使用这个命令的输出结果，根本没有显示蓝牙的任何字样，即使可以正常使用蓝牙的5.15.34内核版本下也没有。输出如下：

Reading package lists... Done
Building dependency tree
Reading state information... Done
inxi is already the newest version (3.0.32-1-1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
System: Host: yny Kernel: 5.15.34-amd64-desktop x86_64 bits: 64 Desktop: Deepin 20.9 Distro: Deepin 20.9
Machine: Type: Desktop Mobo: SYWZ model: S210H Series serial: UEFI: American Megatrends v: 5.17
date: 11/11/2020
CPU: Topology: 8-Core model: Intel Core i9-10980HK bits: 64 type: MT MCP L2 cache: 16.0 MiB
Speed: 4724 MHz min/max: 800/5300 MHz Core speeds (MHz): 1: 4298 2: 3743 3: 2154 4: 4244 5: 4155 6: 2118
7: 1918 8: 1898 9: 3512 10: 4398 11: 4379 12: 2586 13: 4417 14: 3328 15: 3813 16: 4559
Graphics: Device-1: Intel driver: i915 v: kernel
Display: x11 server: X.Org 1.20.11 driver: modesetting unloaded: fbdev,vesa resolution: 3840x2160~60Hz
OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa 21.3.8
Audio: Device-1: Intel driver: snd_hda_intel
Sound Server: ALSA v: k5.15.34-amd64-desktop
Network: Device-1: Intel Ethernet I219-V driver: e1000e
IF: eno1 state: up speed: 1000 Mbps duplex: full mac: 30:bf:00:10:80:05
Device-2: Intel I211 Gigabit Network driver: igb
IF: enp2s0 state: down mac: 30:bf:00:10:80:06
Device-3: Intel Wi-Fi 6 AX200 driver: iwlwifi
IF: wlp3s0 state: down mac: 78:2b:46:4f:75:fe
IF-ID-1: uengine0 state: up speed: 10000 Mbps duplex: unknown mac: 92:dc:f0:aa:d7:00
IF-ID-2: veth4RYFPE state: up speed: 10000 Mbps duplex: full mac: fe:57:5c:b2:d6:63
Drives: Local Storage: total: 953.87 GiB used: 466.56 GiB (48.9%)
ID-1: /dev/nvme0n1 vendor: Micron model: MTFDHBA1T0TCK size: 953.87 GiB
Partition: ID-1: / size: 589.58 GiB used: 304.65 GiB (51.7%) fs: ext4 dev: /dev/nvme0n1p3
ID-2: /boot size: 3.87 GiB used: 593.6 MiB (15.0%) fs: ext4 dev: /dev/nvme0n1p2
ID-3: /home size: 339.08 GiB used: 161.34 GiB (47.6%) fs: ext4 dev: /dev/nvme0n1p4
ID-4: swap-1 size: 4.00 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/nvme0n1p6
Sensors: System Temperatures: cpu: 68.0 C mobo: N/A
Fan Speeds (RPM): fan-1: 0 fan-2: 1407 fan-3: 0 fan-4: 0 fan-5: 0
Info: Processes: 443 Uptime: 18m Memory: 62.66 GiB used: 5.75 GiB (9.2%) Shell: bash inxi: 3.0.32
deb https://community-packages.deepin.com/deepin/ apricot main contrib non-free
deb https://com-store-packages.uniontech.com/appstore deepin appstore
deb https://pro-driver-packages.uniontech.com eagle non-free
deb https://community-packages.deepin.com/driver/ driver non-free
deb https://community-packages.deepin.com/printer eagle non-freedeb [signed-by=/usr/share/keyrings/scootersoftware-keyring.gpg] https://www.scootersoftware.com/ bcompare4 non-free
deb [arch=amd64,arm64,armhf] http://packages.microsoft.com/repos/code stable main