Bluetooth Stopped Working "Unknown Bluetooth Controller in /etc/bluetooth/main.conf"

Hello all,

I am running on Hefftor Linux an Arch derivative on a Lenovo X250.

A few weeks ago I disabled bluetooth in XFCE, now I wanted to turn it on again for an external nouse.

Turns out, bluetooth is not working and I cannot get it working

My system is running on kernel version:

Code:# uname -r
5.12.9-arch1-1Kernel module is loaded

Code:# lsmod | grep btusb
btusb 69632 0
btrtl 28672 1 btusb
btbcm 16384 1 btusb
btintel 32768 1 btusb
bluetooth 724992 11 btrtl,btintel,btbcm,bnep,btusb
No bluetooth shows up here:

Code:# lspci --nnk

00:00.0 Host bridge [0600]: Intel Corporation Broadwell-U Host Bridge -OPI [8086:1604] (rev 09)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: bdw_uncore
lspci: Unable to load libkmod resources: error -2
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 5500 [8086:1616] (rev 09)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: i915
00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controller [8086:160c] (rev 09)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: snd_hda_intel
00:14.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB xHCI Controller [8086:9cb1] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: xhci_hcd
00:16.0 Communication controller [0780]: Intel Corporation Wildcat Point-LP MEI Controller #1 [8086:9cba] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: mei_me
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection (3) I218-LM [8086:15a2] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: e1000e
00:1b.0 Audio device [0403]: Intel Corporation Wildcat Point-LP High Definition Audio Controller [8086:9ca0] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 [8086:9c9a] (rev e3)
Kernel driver in use: pcieport
00:1c.1 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 [8086:9c94] (rev e3)
Kernel driver in use: pcieport
00:1d.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB EHCI Controller [8086:9ca6] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge [0601]: Intel Corporation Wildcat Point-LP LPC Controller [8086:9cc3] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] [8086:9c83] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: ahci
00:1f.3 SMBus [0c05]: Intel Corporation Wildcat Point-LP SMBus Controller [8086:9ca2] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: i801_smbus
00:1f.6 Signal processing controller [1180]: Intel Corporation Wildcat Point-LP Thermal Management Controller [8086:9ca4] (rev 03)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: intel_pch_thermal
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5227 PCI Express Card Reader [10ec:5227] (rev 01)
Subsystem: Lenovo Device [17aa:2226]
Kernel driver in use: rtsx_pci
03:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095b] (rev 59)
Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5210]
Kernel driver in use: iwlwifiNone here:

Code:# rkill list all

0: tpacpi_wwan_sw: Wireless WAN
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

I tried the approach in the Arch wiki

When issuing the command: /usr/lib/bluetooth/bluetoothd -n -d

I receive the following error:

Code:bluetoothd[461399]: Bluetooth daemon 5.58
bluetoothd[461399]: src/main.c:check_config() Unknown group Controller in /etc/bluetooth/main.conf
bluetoothd[461399]: src/main.c:parse_config() parsing /etc/bluetooth/main.conf
My main.conf looks like this: see Pastebin

Checking systemctl, it tells me a similar story

Code:# systemctl status bluetooth.service
bluetooth.service - Bluetooth service
Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2021-06-10 19:14:46 CEST; 3 days ago
Docs: man:bluetoothd(8)
Main PID: 262658 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 9370)
Memory: 992.0K
CPU: 22ms
CGroup: /system.slice/bluetooth.service
262658 /usr/lib/bluetooth/bluetoothd

Jun 10 19:14:46 ThinkLin systemd[1]: Starting Bluetooth service...
Jun 10 19:14:46 ThinkLin bluetoothd[262658]: Bluetooth daemon 5.58
Jun 10 19:14:46 ThinkLin bluetoothd[262658]: src/main.c:check_config() Unknown group Controller in /etc/bluetooth/main.conf
Jun 10 19:14:46 ThinkLin systemd[1]: Started Bluetooth service.
Jun 10 19:14:46 ThinkLin bluetoothd[262658]: Starting SDP server
Jun 10 19:14:46 ThinkLin bluetoothd[262658]: Bluetooth management interface 1.19 initializedThe command btmgmt also recognizes no bluetooth controller

Code:[mgmt]# info
Index list with 0 items
[mgmt]# config
Unconfigured index list with 0 items
[mgmt]#
Searching for the error message about the unknown group controller, I haven't come upon a solution yet

I hope here somebody has an idea how I can further troubleshoot this.

Happy to provide additional information in case needed.

Many thanks in advance