I have a bluetooth headset (Sennheiser MM 550-X) connected to my computer through a USB bluetooth dongle (Asus USB-BT400). I'm running Ubuntu 14.10. I would like to configure the headset both as output (headphone) and input source (the mic).
First of all, the headset pairs with the computer:
In the Ubuntu sound settings, if i configure the headset in mode "A2DP", i can send the sound from the computer to the headset. But configuring the input source as my headset switches the mode of the output to HSP/HFP and nothing works anymore (neither sound output or mic)
From my research on the internet i understand that only the HSP/HFP mode can get the mic working. Moreover the dongle uses a Broadcom BCM20702A0 chipset and i found some bug reports about it but i'm not sure whether there is still problems or not with this chipset.
How to get the mic working ?
Edit: add output of lsusb:
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 002: ID 0d3d:0040 Tangtop Technology Co., Ltd Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 0b05:17cb ASUSTek Computer, Inc. Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Edit2: update to Jeremy31 answer. My headset is 00:16:94:0F:23:C6
[35677.706802] usbcore: deregistering interface driver btusb [35677.709252] Bluetooth: hci0 urb ffff8800d5ec6840 failed to resubmit (2) [35690.999061] usbcore: registered new interface driver btusb