The firmware is NOT loaded correctly... the "bu" file is loaded instead of the "b"
I used to have Ubuntu 21.10 and my Bluetooth USB dongle was loading rtl8761b_fw.bin. Last week I upgraded to Ubuntu 22.04 and since then I can not use my USB dongle, it connects my Sony headphones and immediately disconnects, connects, disconnects, ... Using sudo dmesg | grep Bluetooth, I saw [ 10.106036] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761 [ 10.107035] Bluetooth: hci0: RTL: rom_version status=0 version=1 [ 10.107038] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_fw.bin [ 10.108050] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_config.bin [ 10.108170] Bluetooth: hci0: RTL: cfg_sz 6, total sz 27814 So kernel 5.15 loads different firmware rtl8761bu instead of rtl8761b used by kernel 5.13 in Ubuntu 21.10. I guess this is a kernel bug. As a workaround I made symbolic links and now my Bluetooth USB dongle works fine: /lib/firmware/rtl_bt$ ls -al *8761* lrwxrwxrwx 1 root root 19 Apr 10 06:32 rtl8761bu_config.bin -> rtl8761b_config.bin lrwxrwxrwx 1 root root 15 Apr 10 06:32 rtl8761bu_fw.bin -> rtl8761b_fw.bin -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1968604 Title: rtl8761b usb bluetooth doesn't work following reboot until unplug/replug Status in linux-firmware package in Ubuntu: New Bug description: I have usb bluetooth 5.0 dongle which uses Realtek RTL8761B chip. 0bda:8771 Realtek Semiconductor Corp. Bluetooth Radio USB adapter very often stops working, can't connect or find other bluetooth devices. The adapter can't work even after reboots. The following entries appear in the log: апр 11 13:47:14 desktop kernel: Bluetooth: hci0: command 0x2005 tx timeout апр 11 13:47:16 desktop kernel: Bluetooth: hci0: command 0x2041 tx timeout апр 11 13:47:18 desktop kernel: Bluetooth: hci0: command 0x2042 tx timeout Firmware loaded correctly, but something is not working. апр 11 13:46:54 desktop kernel: Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761 апр 11 13:46:54 desktop kernel: Bluetooth: hci0: RTL: rom_version status=0 version=1 апр 11 13:46:54 desktop kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_fw.bin апр 11 13:46:54 desktop kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_config.bin апр 11 13:46:54 desktop kernel: Bluetooth: hci0: RTL: cfg_sz 6, total sz 27814 1) I use: Description: Ubuntu Jammy Jellyfish (development branch) Release: 22.04 2) linux-firmware: 20220329.git681281e4-0ubuntu1 3) What you expected to happen? I expect a well working bluetooth adapter. 4) What happened instead? My bluetooth adapter may work, may not. The adapter may stop finding and connecting to other devices. I've found the same bug https://bugzilla.kernel.org/show_bug.cgi?id=214111#c1 I've downloaded Windows's archive http://download.windowsupdate.com/d/msdownload/update/driver/drvs/2021/05/ca0e770c-6a5d-4de0-b37a-f4b91cccd8c3_7778831d2b9d721cf94d5a8d8c0676ff1b96c874.cab I've unpacked file rtl8761b_mp_chip_bt40_fw_asic_rom_patch_new.dll and replaced /usr/lib/firmware/rtl_bt/rtl8761bu_fw.bin and deleted rtl8761bu_config.bin After I changed firmware my usb dongle work fine. Could you change firmware rtl8761bu_fw.bin rtl8761bu_config.bin to other correct version? Could you move Realtek's rtl_bt firmware or RTL8761B's firmware into separate packages. I will remove the RTL8761B firmware package and put them manually. bluetoothctl --version bluetoothctl: 5.64 hci0: Type: Primary Bus: USB BD Address: 00:E0:4C:FC:E2:03 ACL MTU: 1021:6 SCO MTU: 255:12 UP RUNNING RX bytes:5751 acl:49 sco:0 events:489 errors:0 TX bytes:219114 acl:398 sco:0 commands:83 errors:0 Features: 0xff 0xff 0xff 0xfe 0xdb 0xfd 0x7b 0x87 Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 Link policy: RSWITCH HOLD SNIFF PARK Link mode: PERIPHERAL ACCEPT Name: 'desktop' Class: 0x7c0104 Service Classes: Rendering, Capturing, Object Transfer, Audio, Telephony Device Class: Computer, Desktop workstation HCI Version: 5.1 (0xa) Revision: 0x97b LMP Version: 5.1 (0xa) Subversion: 0xec43 Manufacturer: Realtek Semiconductor Corporation (93) rfkill list 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Realtek's worker updated these bad firmware. https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=45dc5f0b8e2f2d43312d22511cb26658b9ee2c80 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1968604/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
