I would just use terminal to pair with the headset if the bluetooth manager is causing problems
bluetoothctl
scan on
If the headset is in pairing mode it should show as a
[NEW] Device
followed by the MAC address and it's bluetooth name
Then just do
pair
followed by the MAC address- use capital letters
trust
followed by the MAC and then use connect
followed by the MAC and finally you can quit bluetoothctl
with the quit
command.
As an example, I have a device that reports as [NEW] Device E8:07:BF:05:7D:BA iHome iBT60
So I would
pair E8:07:BF:05:7D:BA
trust E8:07:BF:05:7D:BA
connect E8:07:BF:05:7D:BA
quit
The terminal will give you feedback as the whether each command is successful. If the device doesn't show in Sound Settings after this check
pactl list short | grep blue
See if module-bluetooth-discover is loaded, if not
pactl load-module module-bluetooth-discover
Then connect to the device and it should appear in Sound Settings
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