[Bug 2160975] Re: Regression: Bluetooth HFP profile broken on RTL8723BU (Boat Airdopes 280 ANC) in Ubuntu 26.04

Thanks. The WirePlumber log shows the HFP/SCO transport being set up with the MSBC codec and no error, so the failure is after SCO bring-up. To pin it down more, please can you do all of the following in one sitting (so the timestamps line up) and attach the results: 0. The log names the device "Boat Rockerz 525", but the report says "Boat Airdopes 280 ANC". Are these captures from the same headset? 1. CVSD test: in Settings > Sound (profile dropdown), pick the headset profile labelled "Headset Head Unit (HSP/HFP, codec CVSD)", then test speaker and mic. Does audio works in CVSD? 2. Link-level capture (needs root; note: this file contains Bluetooth MAC addresses): sudo btmon -w hci.btsnoop Leave it running, switch to HFP, try speaker + mic for ~10s, then Ctrl-C. 3. PipeWire debug across the same switch: wpctl set-log-level 4 journalctl --user -u pipewire -f > pw.log switch to HFP, try speaker + mic, Ctrl-C. Run wpctl set-log-level 0 afterwards to stop the logging. Attach hci.btsnoop and pw.log, and post the CVSD result + headset confirmation as a comment. The HFP/SCO datapath was changed a lot between your affected versions upstream. ** Changed in: pipewire (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2160975 Title: Regression: Bluetooth HFP profile broken on RTL8723BU (Boat Airdopes 280 ANC) in Ubuntu 26.04 Status in bluez package in Ubuntu: New Status in linux package in Ubuntu: New Status in pipewire package in Ubuntu: Incomplete Bug description: Summary Bluetooth HFP/HSP profile is broken on Ubuntu 26.04. Hardware Computer: Intel 2nd Generation Core platform Bluetooth controller: Realtek RTL8723BU Headset: Boat Airdopes 280 ANC Problem A2DP playback works correctly. When switching to the Hands-Free Profile (HFP/HSP): - Speaker stops working. - Microphone stops working. - Audio applications cannot use the headset for calls. Expected result Speaker and microphone should both work in HFP mode. Actual result Both speaker and microphone stop functioning after switching to HFP. Regression testing Windows: ✓ Speaker works ✓ Microphone works Ubuntu 25.04 Live USB: ✓ Speaker works ✓ Microphone works Ubuntu 26.04 Live USB: ✗ Speaker does not work in HFP ✗ Microphone does not work in HFP Ubuntu 26.04 fresh installation: Same issue. Additional information This issue is reproducible on a clean installation and also on the Ubuntu 26.04 Live USB, so it is not caused by user configuration. The issue does not occur on Ubuntu 25.04 using the same hardware. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: bluez 5.85-4ubuntu0.1 ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6 Uname: Linux 7.0.0-27-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Jul 16 16:18:38 2026 InstallationDate: Installed on 2026-07-11 (5 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) InterestingModules: rfcomm bnep btusb bluetooth MachineType: ZEBRONICS H61 ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic root=UUID=913bbcc0-7ffa-4947-b9a7-bd0343f2b273 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: bluez UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/21/2025 dmi.bios.release: 4.6 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H61 dmi.board.vendor: ZEBRONICS dmi.board.version: V1.3 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd08/21/2025:br4.6:svnZEBRONICS:pnH61:pvrTobefilledbyO.E.M.:rvnZEBRONICS:rnH61:rvrV1.3:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuTobefilledbyO.E.M.:pfaTobefilledbyO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: H61 dmi.product.sku: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: ZEBRONICS hciconfig: hci0: Type: Primary Bus: USB BD Address: 00:1F:05:78:76:8B ACL MTU: 820:8 SCO MTU: 255:16 UP RUNNING PSCAN RX bytes:1494 acl:0 sco:0 events:163 errors:0 TX bytes:28311 acl:0 sco:0 commands:164 errors:0 modified.conffile..etc.bluetooth.main.conf: [deleted] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/2160975/+subscriptions