Public bug reported:
[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.
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "logs_for_BT_non_working.txt"
https://bugs.launchpad.net/bugs/2098088/+attachment/5856755/+files/logs_for_BT_non_working.txt
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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
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