Bluetooth doesn't work on Ubuntu 24.04

I've installed Ubuntu 24.04 on my Geekom A7. I am not able to figure out why Bluetooth is not working. My problem looks the same as described here.

Bluetooth works fine on Windows on the same Geekom A7 mini PC.

1. rfkill shows that Bluetooth is not blocked.

   rfkill list all
   0: hci0: Bluetooth
       Soft blocked: no
       Hard blocked: no
   

2. bluetoothctl reports that there is no default controller.

   [bluetooth]# devices
   No default controller available
   

3. lsmod shows

   lsmod | grep bluetooth
   bluetooth            1089536  15 btrtl,btmtk,btintel,btbcm,bnep,btusb
   ecdh_generic           16384  1 bluetooth
   

4. systemctl shows

   systemctl status bluetooth.service
   ● bluetooth.service - Bluetooth service
        Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: enabled)
        Active: active (running) since Fri 2024-05-24 11:05:05 CST; 13min ago
          Docs: man:bluetoothd(8)
      Main PID: 1029 (bluetoothd)
        Status: "Running"
         Tasks: 1 (limit: 37566)
        Memory: 2.8M (peak: 3.1M)
           CPU: 32ms
        CGroup: /system.slice/bluetooth.service
                └─1029 /usr/libexec/bluetooth/bluetoothd
   
   May 24 11:05:05 terrasoff-A7 systemd[1]: Started bluetooth.service - Bluetooth service.
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: Starting SDP server
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: src/plugin.c:plugin_init() System does not support csip plugin
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: profiles/audio/micp.c:micp_init() D-Bus experimental not enabled
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: src/plugin.c:plugin_init() System does not support micp plugin
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: src/plugin.c:plugin_init() System does not support vcp plugin
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: src/plugin.c:plugin_init() System does not support mcp plugin
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: src/plugin.c:plugin_init() System does not support bass plugin
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: src/plugin.c:plugin_init() System does not support bap plugin
   May 24 11:05:05 terrasoff-A7 bluetoothd[1029]: Bluetooth management interface 1.22 initialized
   

5. dmesg | grep -i Bluetooth shows

   [    6.914793] Bluetooth: Core ver 2.22
   [    6.914815] NET: Registered PF_BLUETOOTH protocol family
   [    6.914816] Bluetooth: HCI device and connection manager initialized
   [    6.914819] Bluetooth: HCI socket layer initialized
   [    6.914821] Bluetooth: L2CAP socket layer initialized
   [    6.914825] Bluetooth: SCO socket layer initialized
   [    8.512540] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
   [    8.512545] Bluetooth: BNEP filters: protocol multicast
   [    8.512549] Bluetooth: BNEP socket layer initialized
   [    8.933590] Modules linked in: qrtr bnep binfmt_misc intel_rapl_msr nls_iso8859_1 intel_rapl_common snd_hda_codec_realtek amdgpu(+) edac_mce_amd snd_hda_codec_generic snd_hda_codec_hdmi kvm_amd snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi kvm snd_hda_codec irqbypass snd_hda_core mt7921e crct10dif_pclmul snd_hwdep amdxcp mt7921_common polyval_clmulni btusb snd_pcm drm_exec mt792x_lib polyval_generic btrtl gpu_sched snd_seq_midi mt76_connac_lib ghash_clmulni_intel btintel drm_buddy snd_seq_midi_event mt76 sha256_ssse3 btbcm drm_suballoc_helper drm_ttm_helper snd_rawmidi sha1_ssse3 btmtk ttm snd_seq mac80211 aesni_intel bluetooth drm_display_helper snd_seq_device crypto_simd snd_timer cec ecdh_generic cryptd rc_core cfg80211 snd ecc wmi_bmof rapl i2c_algo_bit input_leds joydev ccp soundcore k10temp libarc4 i2c_piix4 apple_mfi_fastcharge amd_pmc mac_hid msr parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables autofs4 hid_logitech_hidpp hid_logitech_dj hid_apple hid_generic usbhid sdhci_pci
   [    9.061366] Bluetooth: hci0: Opcode 0x0c03 failed: -110
   

6. lsusb doesn't show my Bluetooth name:

   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 003 Device 002: ID 13d3:3585 IMC Networks Wireless_Device
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 005 Device 002: ID 05e3:0610 Genesys Logic, Inc. Hub
   Bus 005 Device 005: ID 046d:c534 Logitech, Inc. Unifying Receiver
   Bus 005 Device 006: ID 05ac:024f Apple, Inc. Aluminium Keyboard (ANSI)
   Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 006 Device 002: ID 05e3:0625 Genesys Logic, Inc. USB3.2 Hub
   Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   

7. hcitool dev doesn't find any bluetooth device.

8. /var/lib/bluetooth is empty.

9. lspci shows:

   00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14e8
   00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Device 14e9
   00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
   00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
   00:02.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
   00:02.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
   00:02.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
   00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14ee
   00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
   00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 19h USB4/Thunderbolt PCIe tunnel
   00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
   00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14ea
   00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14eb
   00:08.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14eb
   00:08.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 14eb
   00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 71)
   00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
   00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f0
   00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f1
   00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f2
   00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f3
   00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f4
   00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f5
   00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f6
   00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 14f7
   01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 05)
   02:00.0 Network controller: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
   03:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01)
   04:00.0 Non-Volatile memory controller: Phison Electronics Corporation PS5021-E21 PCIe4 NVMe Controller (DRAM-less)
   65:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix1 (rev c2)
   65:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller
   65:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Family 19h (Model 74h) CCP/PSP 3.0 Device
   65:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15b9
   65:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15ba
   65:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller
   65:00.7 Signal processing controller: Advanced Micro Devices, Inc. [AMD] Device 164a
   66:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device 14ec
   66:00.1 Signal processing controller: Advanced Micro Devices, Inc. [AMD] AMD IPU Device
   67:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device 14ec
   67:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15c0
   67:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15c1
   67:00.5 USB controller: Advanced Micro Devices, Inc. [AMD] Pink Sardine USB4/Thunderbolt NHI controller #1
   

Do you have any ideas about how to fix it?

I just upgraded from 22.04 to 24.04 and ran into the exact same problem. Found a "solution" that had me entering in terminal:

systemctl --user enable pulseaudio
systemctl --user start pulseaudio

This worked for me but it does not persist between sessions. Had to add these two lines to my .xsessionrc file in my home directory to make it persist. That's not a real solution but, until a real fix is released, it has to do.