No Bluetooth Adapters Found

I have no idea what happened. My Bluetooth mouse was no longer working. Then I noticed the Bluetooth icon missing from the system tray. Nothing in settings either…

I ran sudo systemctl enable bluetooth, nothing.
I reinstalled the Bluetooth utilities: yay -S bluez bluez-utils bluedevil, rebooted, ran sudo systemctl enable bluetooth again, nothing.

EDIT:

❯ inxi -Eaz
Bluetooth:
  Message: No bluetooth data found.
❯ inxi -Fxxxrz
System:
  Kernel: 6.12.10-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 14.2.1
    clocksource: tsc
  Desktop: KDE Plasma v: 6.2.5 tk: Qt v: N/A wm: kwin_wayland vt: 1 dm: SDDM
    Distro: EndeavourOS base: Arch Linux
Machine:
  Type: Desktop Mobo: N/A model: N/A serial: <superuser required>
    uuid: <superuser required> UEFI: American Megatrends LLC. v: 5.26
    date: 04/12/2024
CPU:
  Info: quad core model: Intel N100 bits: 64 type: MCP smt: <unsupported>
    arch: Alder Lake rev: 0 cache: L1: 384 KiB L2: 2 MiB L3: 6 MiB
  Speed (MHz): avg: 700 min/max: 700/3400 cores: 1: 700 2: 700 3: 700 4: 700
    bogomips: 6451
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: Intel Alder Lake-N [UHD Graphics] driver: i915 v: kernel arch: Xe
    ports: active: HDMI-A-1 empty: DP-1,HDMI-A-2 bus-ID: 00:02.0
    chip-ID: 8086:46d1 class-ID: 0300
  Display: wayland server: X.org v: 1.21.1.15 with: Xwayland v: 24.1.4
    compositor: kwin_wayland driver: X: loaded: modesetting
    alternate: fbdev,intel,vesa dri: iris gpu: i915 display-ID: 0
  Monitor-1: HDMI-A-1 model: Samsung Smart M70D serial: <filter> res:
    mode: 3840x2160 hz: 60 scale: 160% (1.6) to: 2400x1350 dpi: 140
    size: 698x392mm (27.48x15.43") diag: 801mm (31.5") modes: max: 3840x2160
    min: 640x480
  API: EGL v: 1.5 hw: drv: intel iris platforms: device: 0 drv: iris
    device: 1 drv: swrast gbm: drv: iris surfaceless: drv: iris wayland:
    drv: iris x11: drv: iris
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 24.3.3-arch1.2
    glx-v: 1.4 direct-render: yes renderer: Mesa Intel Graphics (ADL-N)
    device-ID: 8086:46d1 display-ID: :1.0
  API: Vulkan v: 1.4.303 layers: 4 surfaces: xcb,xlib,wayland device: 0
    type: integrated-gpu driver: N/A device-ID: 8086:46d1
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor wl: wayland-info
    x11: xdpyinfo, xprop, xrandr
Audio:
  Device-1: Intel Alder Lake-N PCH High Definition Audio driver: snd_hda_intel
    v: kernel bus-ID: 00:1f.3 chip-ID: 8086:54c8 class-ID: 0403
  Device-2: Zoran Personal Media Division (Nogatech) USB Audio and HID
    driver: snd-usb-audio type: USB rev: 2.0 speed: 12 Mb/s lanes: 1
    bus-ID: 1-6:8 chip-ID: 0573:1573 class-ID: 0300 serial: <filter>
  API: ALSA v: k6.12.10-zen1-1-zen status: kernel-api
  Server-1: PipeWire v: 1.2.7 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    4: pw-jack type: plugin
Network:
  Device-1: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
    driver: r8169 v: kernel pcie: speed: 2.5 GT/s lanes: 1 port: 4000
    bus-ID: 01:00.0 chip-ID: 10ec:8168 class-ID: 0200
  IF: enp1s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  Device-2: Realtek RTL8821CE 802.11ac PCIe Wireless Network Adapter
    driver: rtw_8821ce v: N/A pcie: speed: 2.5 GT/s lanes: 1 port: 3000
    bus-ID: 02:00.0 chip-ID: 10ec:c821 class-ID: 0280
  IF: wlan0 state: down mac: <filter>
Drives:
  Local Storage: total: 953.88 GiB used: 268.84 GiB (28.2%)
  ID-1: /dev/sda vendor: Lexar model: SSD NS100 512GB size: 476.94 GiB
    speed: 6.0 Gb/s tech: SSD serial: <filter> fw-rev: 525 scheme: GPT
  ID-2: /dev/sdb model: SATA SSD size: 476.94 GiB speed: 6.0 Gb/s tech: SSD
    serial: <filter> fw-rev: 0B0 scheme: GPT
Partition:
  ID-1: / size: 450.71 GiB used: 268.54 GiB (59.6%) fs: ext4 dev: /dev/sdb2
Swap:
  ID-1: swap-1 type: partition size: 16.95 GiB used: 0 KiB (0.0%) priority: -2
    dev: /dev/sdb3
Sensors:
  Src: lm-sensors+/sys Message: No sensor data found using /sys/class/hwmon
    or lm-sensors.
Repos:
  Packages: 1545 pm: pacman pkgs: 1535 pm: flatpak pkgs: 10
  Active pacman repo servers in: /etc/pacman.d/endeavouros-mirrorlist
    1: https://mirrors.gigenet.com/endeavouros/repo/$repo/$arch
    2: https://repo.c48.uk/endeavouros/repo/$repo/$arch
    3: https://mirror.moson.org/endeavouros/repo/$repo/$arch
    4: https://md.mirrors.hacktegic.com/endeavouros/repo/$repo/$arch
    5: https://fosszone.csd.auth.gr/endeavouros/repo/$repo/$arch
    6: https://mirror.accum.se/mirror/endeavouros/repo/$repo/$arch
    7: https://ftp.belnet.be/mirror/endeavouros/repo/$repo/$arch
    8: https://mirror.funami.tech/endeavouros/repo/$repo/$arch
    9: https://fastmirror.pp.ua/endeavouros/repo/$repo/$arch
    10: https://ftp.rz.tu-bs.de/pub/mirror/endeavouros/repo/$repo/$arch
    11: https://mirror.jingk.ai/endeavouros/repo/$repo/$arch
    12: https://mirrors.c0urier.net/linux/endeavouros/repo/$repo/$arch
    13: https://mirrors.nxtgen.com/endeavouros-mirror/repo/$repo/$arch
    14: https://mirror.nag.albony.in/endeavouros/repo/$repo/$arch
    15: https://mirror.archlinux.tw/EndeavourOS/repo/$repo/$arch
    16: https://mirror.freedif.org/EndeavourOS/repo/$repo/$arch
    17: https://mirrors.tuna.tsinghua.edu.cn/endeavouros/repo/$repo/$arch
    18: https://www.miraa.jp/endeavouros/repo/$repo/$arch
    19: https://mirrors.jlu.edu.cn/endeavouros/repo/$repo/$arch
    20: https://mirror.alpix.eu/endeavouros/repo/$repo/$arch
    21: https://mirror.sjtu.edu.cn/endeavouros/repo/$repo/$arch
    22: https://mirror.rznet.fr/endeavouros/repo/$repo/$arch
  Active pacman repo servers in: /etc/pacman.d/mirrorlist
    1: https://mirror.osbeck.com/archlinux/$repo/os/$arch
    2: https://arch.mirror.constant.com/$repo/os/$arch
    3: https://america.mirror.pkgbuild.com/$repo/os/$arch
    4: https://geo.mirror.pkgbuild.com/$repo/os/$arch
    5: https://london.mirror.pkgbuild.com/$repo/os/$arch
    6: https://us.arch.niranjan.co/$repo/os/$arch
    7: https://de.arch.niranjan.co/$repo/os/$arch
    8: https://mirror.23m.com/archlinux/$repo/os/$arch
    9: https://mirror.peeres-telecom.fr/archlinux/$repo/os/$arch
    10: https://archlinux.uk.mirror.allworldit.com/archlinux/$repo/os/$arch
    11: https://al.arch.niranjan.co/$repo/os/$arch
    12: https://mirror.moson.org/arch/$repo/os/$arch
    13: https://de.arch.mirror.kescher.at/$repo/os/$arch
    14: https://at.arch.mirror.kescher.at/$repo/os/$arch
    15: https://europe.mirror.pkgbuild.com/$repo/os/$arch
    16: https://arch.phinau.de/$repo/os/$arch
    17: https://mirror.pseudoform.org/$repo/os/$arch
    18: https://mirror.accum.se/mirror/archlinux/$repo/os/$arch
    19: https://md.mirrors.hacktegic.com/archlinux/$repo/os/$arch
    20: https://sydney.mirror.pkgbuild.com/$repo/os/$arch
    21: https://asia.mirror.pkgbuild.com/$repo/os/$arch
    22: https://in.arch.niranjan.co/$repo/os/$arch
    23: https://archlinux.thaller.ws/$repo/os/$arch
    24: https://mirror.ufscar.br/archlinux/$repo/os/$arch
    25: https://mirror.telepoint.bg/archlinux/$repo/os/$arch
Info:
  Memory: total: 16 GiB note: est. available: 15.4 GiB used: 4.53 GiB (29.4%)
  Processes: 199 Power: uptime: 19m states: freeze,mem,disk suspend: deep
    wakeups: 0 hibernate: platform Init: systemd v: 257 default: graphical
  Compilers: clang: 19.1.7 gcc: 14.2.1 Shell: fish v: 3.7.1
    running-in: kitty inxi: 3.3.37

Very strange. I used my truobleshooting user account and the same thing was happening. But after updating this morning, all is well and Bluetooth is working and available again.

Yesterday morning:

❯ inxi -Eaz
Bluetooth:
  Message: No bluetooth data found.

This morning after updating:

❯ inxi -Eaz
Bluetooth:
  Device-1: Realtek Bluetooth Radio driver: btusb v: 0.8 type: USB rev: 1.1
    speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 1-5:4 chip-ID: 0bda:c821
    class-ID: e001 serial: <filter>
  Report: btmgmt ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 4.2
    lmp-v: 8 status: discoverable: no pairing: no class-ID: 6c0104

Oh, well. I guess I shouldn’t complain, it’s working again. But I am curious as to why Bluetooth was completely gone between updates.

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