@Marco On my machine with BT moudle 8087:0026, I reproduced the problem, and replaced with 20.10 firmware ibt-19-0-4.sfi, but still could not work in hsp/hfp mode.
What I found is the bt driver can't receive the SCO packet, the returned packet length is always 0. And if the bt headset can't work in the hsp/hfp mode, please run hci config, if the output like below (RX bytes: sco:0 TX bytes: sco:1), that means the bt driver can't receive SCO packets, as a result the headset can't work in hsp/hfp mode since hsp/hfp mode depends on SCO link. hci0: Type: Primary Bus: USB BD Address: D4:D2:52:3D:49:E6 ACL MTU: 1021:4 SCO MTU: 96:6 UP RUNNING PSCAN RX bytes:23638 acl:85 sco:0 events:3463 errors:0 TX bytes:980646 acl:323 sco:1 commands:3121 errors:0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871794 Title: [Bluetooth] No audio output/input in HSP/HFP mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1871794/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs