Dear all,
I do have a Dell XPS 13 7390 laptop running Ubuntu 20.04:
Linux martin-XPS-13-7390 5.11.0-38-generic #42~20.04.1-Ubuntu SMP Tue
Sep 28 20:41:07 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
with Intel bluetooth card. dmesg recognizes it as:
usb 1-7: New USB device found, idVendor=8087, idProduct=0029, bcdDevice=
0.01
It uses the btusb driver.
The driver / chip has problems to connect / pair with some headsets /
speakers. Namely the Sony SRS-XB12 Mini speaker and the Teufel True Airy
Wireless headset.
Pairing other speaker devices with the XPS works fine and the Sony and
Teufel itself pair fine with other linux laptops / android smartphones.
I'd like to concentrate on the Teufel, as I have logged the pairing
conversation.
It looks like this on btmon:
@ MGMT Command: Pair Device (0x0019) plen 8 {0x0001} [hci0]
8.822002
BR/EDR Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Capability: KeyboardDisplay (0x04)
< HCI Command: Create Connection (0x01|0x0005) plen 13 #22 [hci0]
8.822041
Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Packet type: 0xcc18
DM1 may be used
DH1 may be used
DM3 may be used
DH3 may be used
DM5 may be used
DH5 may be used
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
Role switch: Allow slave (0x01)
> HCI Event: Command Status (0x0f) plen 4 #23 [hci0]
8.822352
Create Connection (0x01|0x0005) ncmd 1
Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #28 [hci0]
39.891457
Status: LMP Response Timeout / LL Response Timeout (0x22)
Handle: 65535
Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
@ MGMT Event: Connect Failed (0x000d) plen 8 {0x0002} [hci0]
39.891549
BR/EDR Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Status: Timeout (0x08)
@ MGMT Event: Connect Failed (0x000d) plen 8 {0x0001} [hci0]
39.891549
BR/EDR Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Status: Timeout (0x08)
@ MGMT Event: Command Complete (0x0001) plen 10 {0x0001} [hci0]
39.891575
Pair Device (0x0019) plen 7
Status: Timeout (0x08)
BR/EDR Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
So it pretty much looks like the laptop sends a connection request, but
never sees a reply from the Teufel headset.
Same conversation for a Surface Pro 3 laptop (with some broadcom
bluetooth chip if I remember correctly, also using btusb driver):
@ MGMT Command: Pair Device (0x0019) plen 8 {0x0001} [hci0]
4.925811
BR/EDR Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Capability: DisplayYesNo (0x01)
< HCI Command: Create Connection (0x01|0x0005) plen 13 #50 [hci0]
4.925831
Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Packet type: 0xcc18
DM1 may be used
DH1 may be used
DM3 may be used
DH3 may be used
DM5 may be used
DH5 may be used
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
Role switch: Allow slave (0x01)
> HCI Event: Command Status (0x0f) plen 4 #51 [hci0]
4.928927
Create Connection (0x01|0x0005) ncmd 1
Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #54 [hci0]
5.077961
Status: Success (0x00)
Handle: 1
Address: 00:00:B0:05:65:67 (RND-RAD NETWORK DEVICES)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
< HCI Command: Read Remote Supporte.. (0x01|0x001b) plen 2 #55 [hci0]
5.078179
Handle: 1
> HCI Event: Command Status (0x0f) plen 4 #56 [hci0]
5.078928
Read Remote Supported Features (0x01|0x001b) ncmd 1
Status: Success (0x00)
[...]
What could cause the Intel 8087 / 0029 bluetooth chip / driver not being
able to connect to the Teufel speakers?
There is also another report with a similar problem here:
https://askubuntu.com/questions/1020584/apple-keyboard-a1016-pairing-fails
How to further debug this problem?
Is it necessary to buy some bt sniffer hardware to get to the bottom of
this? I would invest in a cheapo 10€ sniffer like this
https://www.amazon.com/-/en/dp/B081WRGL31 but I am not sure if they are
sufficient to capture the pairing process.
kind regards
Martin
