I have the same problem with a fresh 20.04.1 install, kernel 5.4.0.52, Huawei laptop with Ryzen 5, Realtek BT (I tried as well with a tp-link dongle).
Bus 003 Device 002: ID 1358:c123 Realtek Bluetooth Radio In my case A2DP is working, but I can't switch to HFP/HSP from Bluetooth device manager, nor from pulseaudio. -- 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