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Bluetooth Doesn't On

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Dhiemas

My device using Ubuntu 18.04 LTS

When i run bluetoothctl on my ubuntu device, show :

bluetoothctl
Agent registered
[bluetooth]# power off
No default controller available
[bluetooth]# power on
No default controller available
Agent unregistered
Agent registered
[bluetooth]# power off
No default controller available

Then i running to show status ubuntu

systemctl status bluetooth
● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2021-06-23 23:36:56 WIB; 10min ago
     Docs: man:bluetoothd(8)
 Main PID: 16680 (bluetoothd)
   Status: "Running"
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/bluetooth.service
           └─16680 /usr/lib/bluetooth/bluetoothd

Jun 23 23:36:56 dganishabook systemd[1]: Starting Bluetooth service...
Jun 23 23:36:56 dganishabook bluetoothd[16680]: Bluetooth daemon 5.50
Jun 23 23:36:56 dganishabook bluetoothd[16680]: Parsing /etc/bluetooth/main.conf failed: Key file does not start with a group
Jun 23 23:36:56 dganishabook bluetoothd[16680]: Starting SDP server
Jun 23 23:36:56 dganishabook systemd[1]: Started Bluetooth service.
Jun 23 23:36:56 dganishabook bluetoothd[16680]: Version mismatch for sixaxis
Jun 23 23:36:57 dganishabook bluetoothd[16680]: Bluetooth management interface 1.14 initialized
Jun 23 23:36:57 dganishabook bluetoothd[16680]: No Bluetooth address for index 0

Please help, i dont know how to fix this issue. I have to search any solution on Google, but its doesnt working for me

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Pablo Bianchi
Add the output of `uname -r` and `rfkill list all`, you might need to [unblock it](https://unix.stackexchange.com/a/589129/209677). If its already unblocked [maybe](https://unix.stackexchange.com/a/609196/209677) you need to add yourself to bluetooth group (`sudo adduser $USER bluetooth`)
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