使用 Arch Linux 和标识为 RTL8192CU 的蓝牙 USB 加密狗。
安装所有推荐的 bluez 软件包以及其他一些软件包：
extra/bluez 5.51-2 [installed]
Daemons for the bluetooth protocol stack
extra/bluez-libs 5.51-2 [installed]
Deprecated libraries for the bluetooth protocol stack
extra/bluez-qt 5.63.0-1 (kf5) [installed]
Qt wrapper for Bluez 5 DBus API
extra/bluez-utils 5.51-2 [installed]
Development and debugging utilities for the bluetooth protocol stack
community/bluez-tools 0.2.0-4 [installed]
A set of tools to manage Bluetooth devices for Linux
local/bluez-hciconfig 5.50-1 [installed]
deprecated hciconfig tool from bluez
local/bluez-hcitool 5.45-1 [installed]
deprecated rfcomm tool from bluez
我一直在关注 Arch Linux 的 wiki：蓝牙和蓝牙耳机
最初，我在启动 systemd 中的 bluetooth.service 时遇到了问题。如果 /sys/class/bluetooth 不存在，它就不会启动。我设法通过在 /etc/modules-load.d 中的文件中添加 btusb 来强制实现这一点。我现在有一个名为 /sys/class/bluetooth 的目录，但它仍然是空的。
在 dmesg 中我可以看到适配器已被识别并且微码已加载。
[ 23.984058] rtl8192cu: Chip version 0x10
[ 24.072147] rtl8192cu: Board Type 0
[ 24.073623] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 24.074935] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 24.076401] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 24.077927] usbcore: registered new interface driver rtl8192cu
我认为已经加载了正确的模块：
Module Size Used by
bnep 28672 2
fuse 139264 3
rtl8xxxu 139264 0
rtl8192cu 94208 0
snd_hda_codec_hdmi 69632 1
rtl_usb 24576 1 rtl8192cu
rtl8192c_common 65536 1 rtl8192cu
snd_hda_codec_via 24576 1
rtlwifi 126976 3 rtl8192c_common,rtl_usb,rtl8192cu
snd_hda_codec_generic 94208 1 snd_hda_codec_via
ledtrig_audio 16384 1 snd_hda_codec_generic
mac80211 999424 4 rtl_usb,rtl8192cu,rtlwifi,rtl8xxxu
saa7134_alsa 28672 1
intel_rapl_msr 20480 0
intel_rapl_common 28672 1 intel_rapl_msr
cfg80211 856064 2 rtlwifi,mac80211
i915 2326528 26
libarc4 16384 1 mac80211
i2c_algo_bit 16384 1 i915
x86_pkg_temp_thermal 20480 0
saa7134 192512 1 saa7134_alsa
input_leds 16384 0
intel_powerclamp 20480 0
joydev 28672 0
mousedev 24576 0
drm_kms_helper 212992 1 i915
drm 516096 15 drm_kms_helper,i915
tveeprom 28672 1 saa7134
coretemp 20480 0
v4l2_common 16384 1 saa7134
intel_gtt 24576 1 i915
snd_hda_intel 53248 5
videobuf2_dma_sg 16384 1 saa7134
agpgart 53248 2 intel_gtt,drm
videobuf2_memops 20480 1 videobuf2_dma_sg
videobuf2_v4l2 28672 1 saa7134
snd_hda_codec 159744 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_via
kvm 778240 0
videobuf2_common 57344 2 saa7134,videobuf2_v4l2
syscopyarea 16384 1 drm_kms_helper
snd_hda_core 102400 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_via
videodev 237568 4 v4l2_common,saa7134,videobuf2_v4l2,videobuf2_common
sysfillrect 16384 1 drm_kms_helper
irqbypass 16384 1 kvm
mc 61440 4 videodev,saa7134,videobuf2_v4l2,videobuf2_common
rc_core 57344 1 saa7134
r8169 94208 0
sysimgblt 16384 1 drm_kms_helper
iTCO_wdt 16384 0
iTCO_vendor_support 16384 1 iTCO_wdt
snd_hwdep 20480 1 snd_hda_codec
fb_sys_fops 16384 1 drm_kms_helper
realtek 20480 1
libphy 98304 2 r8169,realtek
mei_wdt 16384 0
eeepc_wmi 16384 0
snd_pcm 135168 6 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,saa7134_alsa,snd_hda_core
asus_wmi 36864 1 eeepc_wmi
snd_timer 40960 1 snd_pcm
crct10dif_pclmul 16384 1
wmi_bmof 16384 0
ppdev 24576 0
mei_hdcp 24576 0
sparse_keymap 16384 1 asus_wmi
snd 110592 20 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_timer,snd_hda_codec_via,saa7134_alsa,snd_pcm
lpc_ich 28672 0
soundcore 16384 1 snd
crc32_pclmul 16384 0
mei_me 45056 2
ghash_clmulni_intel 16384 0
mei 122880 5 mei_wdt,mei_hdcp,mei_me
parport_pc 53248 0
i2c_i801 36864 0
aesni_intel 372736 0
parport 61440 2 parport_pc,ppdev
aes_x86_64 20480 1 aesni_intel
crypto_simd 16384 1 aesni_intel
cryptd 24576 2 crypto_simd,ghash_clmulni_intel
evdev 24576 12
mac_hid 16384 0
glue_helper 16384 1 aesni_intel
intel_cstate 16384 0
intel_uncore 147456 0
pcspkr 16384 0
wmi 36864 2 asus_wmi,wmi_bmof
intel_rapl_perf 16384 0
sg 40960 0
crypto_user 16384 0
btusb 65536 0
btrtl 24576 1 btusb
btbcm 16384 1 btusb
btintel 28672 1 btusb
bluetooth 675840 11 btrtl,btintel,btbcm,bnep,btusb
ecdh_generic 16384 1 bluetooth
rfkill 28672 7 asus_wmi,bluetooth,cfg80211
ecc 32768 1 ecdh_generic
ip_tables 36864 0
x_tables 49152 1 ip_tables
ext4 770048 3
crc32c_generic 16384 0
crc16 16384 2 bluetooth,ext4
mbcache 16384 1 ext4
jbd2 135168 1 ext4
uas 28672 0
hid_generic 16384 0
usb_storage 77824 1 uas
usbhid 65536 0
hid 143360 2 usbhid,hid_generic
sr_mod 28672 0
cdrom 73728 1 sr_mod
sd_mod 57344 6
ata_generic 16384 0
pata_acpi 16384 0
ata_piix 36864 4
libata 282624 3 ata_piix,pata_acpi,ata_generic
xhci_pci 20480 0
ehci_pci 20480 0
scsi_mod 249856 6 sd_mod,usb_storage,uas,libata,sg,sr_mod
xhci_hcd 278528 1 xhci_pci
crc32c_intel 24576 6
ehci_hcd 98304 1 ehci_pci