I recently purchased a Bluetooth 4.0 adaptor for my laptop. Bluetooth 2.1 was recognised instantly, but Bluetooth 4.0 is not recognised. Is there a fix for this, or is Ubuntu not compatible with Bluetooth 4.0?
Ubuntu uses the Bluez protocol stack for Bluetooth. From supported protocols we can see what is supported at present:
So the answer is yes, we do support Bluetooth 4.0. You may want to search for specific bugs or incompatibilites with existing brand-new hardware, or have a look at the BlueZ development branches at GIT for more details on future plans, and to find out if your device or a protocol your device needs has issues.