I used a newly installed Ubuntu 22.04LTS OS, and I couldn't turn on the Bluetooth.
I tried the following commands and was able to turn on the Bluetooth:
sudo apt update && sudo apt upgrade sudo systemctl start bluetooth rfkill unblock bluetooth
ps: reboot after execute commands
After that, I was able to turn on Bluetooth on Ubuntu, but I had an error when I connect a pair of Jabra earphones.
Then tried the following way:
- Remove the Jabra device from Ubuntu.
- Turn off other Bluetooth connections of the Jabra earphones.
- Press both the left and the right buttons of the earphones to switch to connection mode.
- Connect from Ubuntu again.
Finally, connect my Bluetooth earphones to Ubuntu!