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* [Bug 221576] New: btmtk: MT7925 USB Bluetooth fails with "Failed to send wmt func ctrl (-22)" since kernel 7.0.7
@ 2026-05-25 16:52 bugzilla-daemon
  2026-05-26  7:53 ` [Bug 221576] " bugzilla-daemon
  0 siblings, 1 reply; 2+ messages in thread
From: bugzilla-daemon @ 2026-05-25 16:52 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=221576

            Bug ID: 221576
           Summary: btmtk: MT7925 USB Bluetooth fails with "Failed to send
                    wmt func ctrl (-22)" since kernel 7.0.7
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: sergey@batalov.email
        Regression: No

Regression between kernel 7.0.2 (working) and 7.0.7 (broken) and 7.0.9
(broken).

Hardware: ThinkPad, MediaTek MT7925 USB Bluetooth
USB ID: 0e8d:e025 (MediaTek Inc. Wireless_Device)

Kernel 7.0.2: Bluetooth initializes successfully
  "Bluetooth: hci0: Device setup in 1774290 usecs"

Kernel 7.0.7 and 7.0.9: Initialization fails
  "Bluetooth: hci0: HW/SW Version: 0x00000000, Build Time: 20260414153243"
  "Bluetooth: hci0: Failed to send wmt func ctrl (-22)"
  "Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is
advertised, but not supported."

Firmware: mediatek/mt7925/BT_RAM_CODE_MT7925_1_1_hdr.bin (present, correct md5)
Distribution: openSUSE Tumbleweed

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2026-05-25 16:52 [Bug 221576] New: btmtk: MT7925 USB Bluetooth fails with "Failed to send wmt func ctrl (-22)" since kernel 7.0.7 bugzilla-daemon
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