Also see https://fosspost.org/fix-bluetooth-rtl8761b-problem-on-linux- ubuntu-22-04/. From the article:
<SNIP> This happens because the rtl8761bu firmware is being requested, but the system should have loaded the rtl8761b firmware, not the rtl8761bu one. The latter may not even exist on your system. To fix this issue, luckily we don’t need to install or download anything! We just need to create a simple symbolic link to link rtl8761bu driver firmware to rtl8761b one. In this way, any time our system requests the rtl8761bu files it will be instead served the correct rtl8761b ones. We can do it by applying the following commands in the terminal: cd /lib/firmware/rtl_bt sudo ln -s rtl8761b_config.bin rtl8761bu_config.bin sudo ln -s rtl8761b_fw.bin rtl8761bu_fw.bin After it, just remove the Bluetooth 5.0 adapter from the computer and plug it again (no restart required), and this time, it should be working. </SNIP> -- 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: Confirmed 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
