Bluetooth doesn't turn on

I can't turn on bluetooth. When i open bluetooth settings I get this showing me that bluetooth is turned off:

When I try to turn it on, the switch turns blue, but nothing happens. When I close settings and re-open it, it still shows me that bluetooth is turned off and the switch is turned back off.I tried using rfkill to unblock it, but when I used sudo rfkl list it shows me that bluetooth is neither hard blocked nor soft blocked.

I also tried restarting the driver using

sudo rmmod btusb
sudo modprobe btusb

and rebooted, but it still didn't work.

It occasionally works when I restart my computer, but sometimes it doesn't even after restarting. How can I fix this issue?

2 Answers

I have the same problem in Ubuntu 20.04 (with kernel 5.11.12). I have something that works for me everytime I want to use the bluetooth:

1. Turn the bluetooth on on that setting's screen you are showing (eventhough it still says that its off, just click on the 'on' toggle on the top right corner).
2. While its on, run the commands you just said:

sudo rmmod btusb
sleep 1
sudo modprobe btusb

Then I can start to see all the available bluetooth devices and connect to them (I use a playstation 3 controller via bluetooth and haven't had a problem with the connection)

The downside is that everytime I turn the bluetooth off or restart the computer, I have to repeat the steps 1 and 2. I'm still looking for a more stable solution.

I also tried blueman but it didn't solve the issue.

I hope we can find a more permanent solution soon.

Seems to be similar to my issue. (Bluetooth service unable to start without “systemctl restart bluetooth”). Please have a look.