I use a Nokia N810 with a Motorola H350 bluetooth headset. Since I started doing this, whenever it paired it switched the speaker and microphone to the headset and displayed a little icon of the headset in place of the normal loudspeaker icon.

But it has stopped doing that. The device has apparently paired OK -both ends have the usual indicators that this has happened, but the audio will no longer switch over to the headset automatically. Reboots don't help.

I can't see any control panel controls that will help me. The sound settings are just about volume and ring tones and the bluetooth settings say it is an Audio/Video device with supported profiles HSP. AFAICR this is as it always was.

Any ideas what is going wrong?