Bluetooth cannot be enabled, after power failure


My PC was running 24 hrs, and after a power outage in the neighborhood, the bluetooth (BT) becomes disabled.
Before the power outage, the BT worked fine and can connect to my BT headset.
Currently, the BT icon appears grey in task tray, and cannot be enabled through system setting.

My system:

KDE Plasma 5.26.5

# rfkill list all                       
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
bluetooth.service - Bluetooth service
     Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: disabled)
     Active: active (running) since Mon 2023-03-06 20:48:07 +08; 33min ago
       Docs: man:bluetoothd(8)
   Main PID: 3773 (bluetoothd)
     Status: "Running"
      Tasks: 1 (limit: 18976)
     Memory: 860.0K
        CPU: 22ms
     CGroup: /system.slice/bluetooth.service
             └─3773 /usr/lib/bluetooth/bluetoothd

Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: MinConnectionInterval=(0)
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: MaxConnectionInterval=(0)
Mar 06 20:48:07 X570S-APAX-MJR systemd[1]: Started Bluetooth service.
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: ConnectionLatency=(0)
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: ConnectionSupervisionTimeout=(0)
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: Autoconnecttimeout=(0)
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: AdvMonAllowlistScanDuration=300(300)
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: AdvMonNoFilterScanDuration=500(500)
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: Starting SDP server
Mar 06 20:48:07 X570S-APAX-MJR bluetoothd[3773]: Bluetooth management interface 1.22 initialized

Considering the issue only arise after power outage, and the above seems to be in order, where else should I troubleshoot?


BT and WiFi is on the same card - try unblocking your wifi

Not working.

The controller allows the WiFi and BT to be configured independently, and previously it was used as “WiFi off; BT on” with no issue.

That is quite possible - and I cannot say what or why.

Next step should be booting the system using a live Manjaro - then check the USB functionality - simply to rule out hardware damage or fail.

After this - it would be removing all paired devices from the pc system and from the devices - then pair them again.

Perhaps scanning using a BT device to see if the pc system is visible - if not check visibility.

Those are - from top drawer - steps I would go through to troubleshoot.

This is absolutely odd.

I have another copy of Manjaro (M2) installed onto other partition. and upon booting into M2, the BT also cannot be enabled.

So I booted into live Manjaro, as per your advice, and the BT is enabled and working.

Now, I was thinking maybe some file corrupted due to power outage, and was preparing to reinstall Manjaro.
But when I booted into initial Manjaro, the BT is working and enabled!
Previously, I already rebooted Manjaro multiple times, and no such “miracle”.

Frankly, I dunno what is happening here…

That has also crossed my mind - but I thought I’d wait to suggest this as a posssibility - until the other options was tested.

The fact that you booted the live ISO and verified the BT may be exactly the gentle nudge the device needed to reset itself.

Regardless, must thank you for your promptly advice.

1 Like