Comment 88 for bug 1871794

Anyway, this is the output of hciconfig -a after I tried to switch to hsp/hfp mode from BlueMan Manager.

hci0: Type: Primary Bus: USB
 BD Address: 5C:BA:EF:99:BC:3C ACL MTU: 1021:6 SCO MTU: 255:12
 UP RUNNING
 RX bytes:2950504 acl:61 sco:0 events:421151 errors:0
 TX bytes:259267232 acl:420944 sco:0 commands:188 errors:0
 Features: 0xff 0xff 0xff 0xfe 0xdb 0xfd 0x7b 0x87
 Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
 Link policy: RSWITCH HOLD SNIFF PARK
 Link mode: SLAVE ACCEPT
 Name: 'RTK_BT_5.0'
 Class: 0x000000
 Service Classes: Unspecified
 Device Class: Miscellaneous,
 HCI Version: 5.1 (0xa) Revision: 0xc
 LMP Version: 5.1 (0xa) Subversion: 0x8822
 Manufacturer: Realtek Semiconductor Corporation (93)