** Attachment added: "ProcModules.txt" https://bugs.launchpad.net/bugs/1950825/+attachment/5540505/+files/ProcModules.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1950825 Title: Unable to pair Dell XPS 13 7390 Intel bluetooth btusb with some headset / speakers Status in linux package in Ubuntu: Confirmed Bug description: 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 usb 1-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0 It uses the btusb driver: usbcore: registered new interface driver btusb 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) also running Ubuntu 20.04: @ 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€ CC2531 clone sniffer (like this https://www.amazon.com/-/en/dp/B081WRGL31) but I am not sure if they are sufficient to capture the pairing process. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: martin 4168 F.... pulseaudio /dev/snd/pcmC0D3p: martin 4168 F...m pulseaudio /dev/snd/pcmC0D0c: martin 4168 F...m pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-bionic-amd64-20180608-47+beaver-three-eyed-raven+X92 DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2019-11-21 (722 days ago) InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 20180608-09:38 MachineType: Dell Inc. XPS 13 7390 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-40-generic root=UUID=9fb13a1c-ce7e-451e-b7ee-f1710b84eccf ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.11.0-40.44~20.04.2-generic 5.11.22 RelatedPackageVersions: linux-restricted-modules-5.11.0-40-generic N/A linux-backports-modules-5.11.0-40-generic N/A linux-firmware 1.187.17 Tags: focal Uname: Linux 5.11.0-40-generic x86_64 UpgradeStatus: Upgraded to focal on 2020-09-27 (411 days ago) UserGroups: adm cdrom dialout dip kvm lp lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 10/22/2020 dmi.bios.release: 1.7 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.7.0 dmi.board.name: 0G2D0W dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.7.0:bd10/22/2020:br1.7:svnDellInc.:pnXPS137390:pvr:sku0962:rvnDellInc.:rn0G2D0W:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 7390 dmi.product.sku: 0962 dmi.sys.vendor: Dell Inc. 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