I'm working through an issue with Bluetooth LE Audio with a new headset (Creative Zen Hybrid Pro). The end result of which is no audio input/output device is created. With the generous help from Pauli (cc'ed) of the pipewire team, we can see the headset connection establishes OK, but then appears to hit a bug in the adapter's firmware (MediaTek MT7922), which triggers a coredump and restarts. Full logs and other context can be found at https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/3666#note_2179246 ... but as an overview of logs via btmon: = Note: Linux version 6.6.1 (x86_64) 0.069372 = Note: Bluetooth subsystem version 2.22 0.069374 = New Index: 14:AC:60:46:9E:9C (Primary,USB,hci3) [hci3] 0.069375 = Open Index: 14:AC:60:46:9E:9C [hci3] 0.069375 = Index Info: 14:AC:60:46:9E:9C (MediaTek, Inc.) [hci3] 0.069376 @ MGMT Open: bluetoothd (privileged) version 1.22 {0x0001} 0.069377 @ MGMT Open: bluetoothctl version 1.22 {0x0002} 0.069378 > ACL Data RX: Handle 512 flags 0x01 dlen 24 #142 [hci3] 12.183718 ATT: Handle Value Notification (0x1b) len 46 < HCI Command: LE Set Connected... (0x08|0x0062) plen 24 #143 [hci3] 12.183932 CIG ID: 0x00 > HCI Event: Command Complete (0x0e) plen 8 #144 [hci3] 12.184357 LE Set Connected Isochronous Group Parameters (0x08|0x0062) ncmd 1 [ ... snip ... ] > HCI Event: Command Status (0x0f) plen 4 #170 [hci3] 12.664283 LE Create Connected Isochronous Stream (0x08|0x0064) ncmd 1 [ ... snip ... ] > HCI Event: LE Meta Event (0x3e) plen 29 #186 [hci3] 13.203205 LE Connected Isochronous Stream Established (0x19) < HCI Command: LE Setup Isochron.. (0x08|0x006e) plen 13 #187 [hci3] 13.203326 Handle: 1024 @ RAW Open: btmon (privileged) version 2.22 {0x0003} 13.203504 @ RAW Close: btmon {0x0003} 13.203512 > HCI Event: Command Complete (0x0e) plen 6 #188 [hci3] 13.203576 LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1 < HCI Command: LE Setup Isochron.. (0x08|0x006e) plen 13 #189 [hci3] 13.203606 Handle: 1024 > HCI Event: Command Complete (0x0e) plen 6 #190 [hci3] 13.203929 LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1 < ACL Data TX: Handle 512 flags 0x00 dlen 10 #191 [hci3] 13.214209 ATT: Write Command (0x52) len 5 = Vendor Diagnostic (len 72) [hci3] 13.323162 6f fc 44 00 3c 41 53 53 45 52 54 3e 20 2e 2e 2f o.D.<ASSERT> ../ [ ... snip ... ] = Vendor Diagnostic (len 19) [hci3] 14.095706 6f fc 0f 00 0a 3b 63 6f 72 65 64 75 6d 70 20 65 o....;coredump e [ ... snip ... ] = bluetoothd: profiles/audio/transport.c:link_set_state() Unable... 14.143326 = Close Index: 14:AC:60:46:9E:9C [hci3] 14.188719 @ MGMT Event: Index Removed (0x0005) plen 0 {0x0001} [hci3] 14.188726 @ MGMT Event: Index Removed (0x0005) plen 0 {0x0002} [hci3] 14.188726 = Delete Index: 14:AC:60:46:9E:9C [hci3] 14.188733 = bluetoothd: profiles/audio/micp.c:micp_detached() unable to fin.. 14.189265 = bluetoothd: profiles/audio/vcp.c:vcp_detached() Unable to find... 14.189498 = bluetoothd: Endpoint unregistered: sender=:1.163 path=/MediaEnd.. 14.190532 = bluetoothd: Endpoint unregistered: sender=:1.163 path=/MediaEnd.. 14.190598 = bluetoothd: Endpoint unregistered: sender=:1.163 path=/MediaEnd.. 14.190653 = bluetoothd: Endpoint unregistered: sender=:1.163 path=/MediaEnd.. 14.190714 = bluetoothd: profiles/audio/bap.c:bap_detached() Unable to find... 14.197087 = bluetoothd: Battery Provider Manager destroyed 14.197851 = New Index: 00:00:00:00:00:00 (Primary,USB,hci0) #0 [hci0] 14.436548 = Open Index: 00:00:00:00:00:00 [hci0] 14.436637 = Index Info: 00:00:00:00:00:00 (MediaTek, Inc.) [hci0] 14.436640 >From the kernel/dmesg side: [ 19.567508] mt7921e 0000:01:00.0: enabling device (0000 -> 0002) [ 19.584454] mt7921e 0000:01:00.0: ASIC revision: 79220010 [ 19.662305] mt7921e 0000:01:00.0: HW/SW Version: 0x8a108a10, Build Time: 20230627143702a [ 20.048165] mt7921e 0000:01:00.0: WM Firmware Version: ____000000, Build Time: 20230627143946 [ 21.137805] mt7921e 0000:01:00.0 wlp1s0: renamed from wlan0 [ 256.380280] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20230627144220 [ 256.521395] Bluetooth: hci0: Device setup in 144287 usecs [ 256.521408] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported. [ 291.819885] Bluetooth: hci0: Opcode 0x2065 failed: -22 [ 293.109210] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20230627144220 [ 293.246331] Bluetooth: hci0: Device setup in 138096 usecs [ 293.246342] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported. [ 315.219892] Bluetooth: hci0: Mediatek coredump end [ 315.431355] usb 1-5: reset high-speed USB device number 3 using xhci_hcd [ 618.882312] bluetoothd[9227]: segfault at 55b685cb1f50 ip 00007f07b909d2ce sp 00007ffee7201e40 error 4 in libc.so.6[7f07b9028000+15a000] likely on CPU 7 (core 3, socket 0) [ 618.882350] Code: ff 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 85 ff 0f 84 bb 00 00 00 55 48 8d 77 f0 53 48 83 ec 18 48 8b 1d 42 db 13 00 <48> 8b 47 f8 64 8b 2b a8 02 75 57 48 8b 15 d0 da 13 00 64 48 83 3a The adapter's firmware `HW/SW Version: 0x008a008a, Build Time: 20230627144220` is the latest in linux-firmware (https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/WHENCE?id=ba1aa06f37477a702ebabf14b5753378460c9343#n5579) Please let me know how best to proceed with this. Thanks!
