Blueman connection error (bluetooth issue)

Solution 1:

I had to unpair/pair my device again. Restarting bluetooth service didn't help.

Solution 2:

run this to reset its configuration. turn off and on bluetooth and connect bluetooth headphone again. i had same issue on ubuntu 16.10 and it solve it! in this case you don't need blueman. run this and in Sound setting select your headphone

rm -r ~/.config/pulse; pulseaudio -k

Solution 3:

I often have this issue:

blueman.bluez.errors.DBusFailedError: Resource temporarily unavailable

with blueman on Ubuntu Mate 18.04 when waking the machine up from suspension.

Simply restarting the bluetooth service with:

sudo systemctl restart bluetooth

and rescanning usually resolves the issue quite easily.

Solution 4:

I used the following command and it solved my problem:

sudo apt-get install pulseaudio-module-bluetooth
pactl load-module module-bluetooth-discover

Then try to reconnect your bluetooth headset.

Solution 5:

I received this error as the headset was already connected to another device (my phone). Check that the device you are wanting to connect to your Ubuntu instance is not already connected to another device, such as a mobile telephone, and then try to connect again.