When using my Sony WH-H900N headphones and switching from A2DP to
HSP/HFP the following error appears in journalctl:
( 60.063| 0.000) D: [pulseaudio] module-bluez5-device.c: Acquiring
transport /org/bluez/hci0/dev_04_5D_4B_E9_C9_90/fd34
( 60.063| 0.000) I: [pulseaudio] backend-native.c: doing connect
( 60.174| 0.111) E: [pulseaudio] backend-native.c: connect():
Function not implemented
And using btmon I can see the HCI command comes back with a failure
(full log attached):
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
Handle: 67
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 10
Setting: 0x0060
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16-bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
Retransmission effort: Optimize for power consumption (0x01)
Packet type: 0x0380
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4
Setup Synchronous Connection (0x01|0x0028) ncmd 1
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3
Handle: 67
Max slots: 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17
Status: Unspecified Error (0x1f)
Handle: 67
Address: 04:5D:4B:E9:C9:90 (Sony Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: u-law log (0x00)
This works on ChromeOS, which also uses a (modified) BlueZ stack -
though I can't work out why :)
< HCI Command: Exit Sniff Mode (0x02|0x0004) plen 2 #4027 [hci0] 59.708361
Handle: 67
> HCI Event: Command Status (0x0f) plen 4 #4028 [hci0] 59.710142
Exit Sniff Mode (0x02|0x0004) ncmd 1
Status: Success (0x00)
> HCI Event: Mode Change (0x14) plen 6 #4029 [hci0] 59.819129
Status: Success (0x00)
Handle: 67
Mode: Active (0x00)
Interval: 0.000 msec (0x0000)
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 #4030 [hci0] 59.819163
Handle: 67
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 10
Setting: 0x0060
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16-bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
Retransmission effort: Optimize for power consumption (0x01)
Packet type: 0x0380
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4 #4031 [hci0] 59.822126
Setup Synchronous Connection (0x01|0x0028) ncmd 1
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #4032 [hci0] 59.828125
Handle: 67
Max slots: 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17 #4033 [hci0] 59.842125
Status: Unspecified Error (0x1f)
Handle: 67
Address: 04:5D:4B:E9:C9:90 (Sony Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: u-law log (0x00)
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 #4034 [hci0] 59.842142
Handle: 67
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 7
Setting: 0x0060
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16-bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
Retransmission effort: Optimize for power consumption (0x01)
Packet type: 0x0380
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4 #4035 [hci0] 59.843141
Setup Synchronous Connection (0x01|0x0028) ncmd 0
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #4036 [hci0] 59.847143
Handle: 67
Max slots: 5
> HCI Event: Command Status (0x0f) plen 4 #4037 [hci0] 59.849125
NOP (0x00|0x0000) ncmd 1
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #4038 [hci0] 59.858142
Handle: 67
Max slots: 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17 #4039 [hci0] 59.884125
Status: Unspecified Error (0x1f)
Handle: 67
Address: 04:5D:4B:E9:C9:90 (Sony Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: u-law log (0x00)
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 #4040 [hci0] 59.884146
Handle: 67
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 7
Setting: 0x0060
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16-bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
Retransmission effort: Optimize for power consumption (0x01)
Packet type: 0x03c8
EV3 may be used
2-EV3 may not be used
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4 #4041 [hci0] 59.885142
Setup Synchronous Connection (0x01|0x0028) ncmd 0
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #4042 [hci0] 59.892121
Handle: 67
Max slots: 5
> HCI Event: Command Status (0x0f) plen 4 #4043 [hci0] 59.893140
NOP (0x00|0x0000) ncmd 1
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #4044 [hci0] 59.903123
Handle: 67
Max slots: 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17 #4045 [hci0] 59.918121
Status: Unspecified Error (0x1f)
Handle: 67
Address: 04:5D:4B:E9:C9:90 (Sony Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: u-law log (0x00)
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 #4046 [hci0] 59.918134
Handle: 67
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 65535
Setting: 0x0060
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16-bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
Retransmission effort: Optimize for power consumption (0x01)
Packet type: 0x03c4
HV3 may be used
2-EV3 may not be used
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4 #4047 [hci0] 59.919142
Setup Synchronous Connection (0x01|0x0028) ncmd 0
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #4048 [hci0] 59.927128
Handle: 67
Max slots: 5
> HCI Event: Synchronous Connect Complete (0x2c) plen 17 #4049 [hci0] 59.929128
Status: Unspecified Error (0x1f)
Handle: 67
Address: 04:5D:4B:E9:C9:90 (Sony Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: u-law log (0x00)
> HCI Event: Command Status (0x0f) plen 4 #4050 [hci0] 59.930129
NOP (0x00|0x0000) ncmd 1
Status: Success (0x00)
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 #4051 [hci0] 59.930153
Handle: 67
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 65535
Setting: 0x0060
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16-bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
Retransmission effort: Optimize for power consumption (0x01)
Packet type: 0x03c1
HV1 may be used
2-EV3 may not be used
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4 #4052 [hci0] 59.932128
Setup Synchronous Connection (0x01|0x0028) ncmd 1
Status: Success (0x00)
> HCI Event: Synchronous Connect Complete (0x2c) plen 17 #4053 [hci0] 59.934132
Status: Unspecified Error (0x1f)
Handle: 67
Address: 04:5D:4B:E9:C9:90 (Sony Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: u-law log (0x00)
> HCI Event: Mode Change (0x14) plen 6 #4054 [hci0] 64.830233
Status: Success (0x00)
Handle: 67
Mode: Sniff (0x02)
Interval: 125.000 msec (0x00c8)
