>From the logs: BAD: 6.8.0-40-generic 20220329.git681281e4-0ubuntu3.31 [ 4.241405] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20231109191416 GOOD: 6.8.0-52-generic 20220329.git681281e4-0ubuntu3.26 [ 4.527423] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20220209151054
For the bad case, they're running an old kernel with new firmware. Theoretically it could be a kernel issue. 1. Please ask them to test the latest kernel with the latest firmware. 2. Given this is the 6.8 HWE kernel and Noble has newer firmware, the next step is to test the firmware from Noble. Please ask them to: - Backup /lib/firmware/mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin.zst - Download [1] and compress it: zstd -19 BT_RAM_CODE_MT7922_1_1_hdr.bin - Copy the new firmware: cp BT_RAM_CODE_MT7922_1_1_hdr.bin.zst /lib/firmware/mediatek/ - Reboot - Verify that the log shows: Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20240219103618 - Rerun the test - Restore the backed up firmware [1] wget -O BT_RAM_CODE_MT7922_1_1_hdr.bin https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux- firmware/plain/mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin?h=noble ** Changed in: linux-firmware (Ubuntu) Status: Triaged => Incomplete -- 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/2098088 Title: bluetooth functionality for mediatek wifi/BT module MT7921AU does not work with latest firmware package on x86_64 platform Status in linux-firmware package in Ubuntu: Incomplete Bug description: [Impact]-: This issue is reported by brand store customer Dcrypt. They reported that on their Elkhart Lake based X86_64 board running Ubuntu 22.04 bluetooth stopped working once they upgraded linux-firmware package from 20220329.git681281e4-0ubuntu3.26 to higher versions(currently 20220329.git681281e4-0ubuntu3.36). Please note that wifi works. Details about their testing platform-: Board hardware-: Arch-:X86_64 CPU -: Intel Atom(R) x6413E Processor Wifi/BT module-: MediaTek MT7921AU ; Module is connected over USB interface. OS-: ubuntu 22.04.5 with 6.8.0-52-generic kernel current linux firmware version 20220329.git681281e4-0ubuntu3.36 [Fix]-: Both wifi and Bluetooth both work well with 20220329.git681281e4-0ubuntu3.26. Customer also reported that latest firmware upgrade from Mediatek in the upstream linux-firmware repository fixes the issue. Please note that customer has not provided any details about the specific tag which they tested from the upstream repo. Additional Information-: Customer has provided kernel logs and output of few commands like lsmod, ip, hciconfig and so on. Please find the attached logs for both working and nonworking case. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2098088/+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
