[Bug 2164844] Re: Bluetooth (MediaTek MT7922) fails with "wmt command timed out" on kernel 7.0.0-30-generic, works on 7.0.0-29-generic

** Tags added: kernel-daily-bug -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2164844 Title: Bluetooth (MediaTek MT7922) fails with "wmt command timed out" on kernel 7.0.0-30-generic, works on 7.0.0-29-generic Status in linux package in Ubuntu: New Bug description: After the automatic kernel update from linux-image-7.0.0-29-generic to linux-image-7.0.0-30-generic (HWE, Ubuntu 24.04.4) on 2026-08-21, the Bluetooth adapter (MediaTek MT7922 WiFi+BT combo, USB ID 0489:e0e0, btusb/btmtk driver) never comes up. bluetoothctl reports “No default controller available” even though bluetooth.service is active and rfkill shows no blocks. journalctl -k shows the HCI device being recreated in an infinite loop (hci0, hci1, hci2, ... hci21+ within minutes), each time failing firmware setup: Bluetooth: hciN: Execution of wmt command timed out Bluetooth: hciN: Failed to send wmt patch dwnld (-110) Bluetooth: hciN: Failed to set up firmware (-110) linux-firmware package was NOT updated in this cycle, so this is not a firmware file issue — it points to a regression in the btusb btmtk driver in kernel 7.0.0-30. Workaround: booting linux-image-7.0.0-29-generic restores working Bluetooth immediately, same hardware, same firmware files. System: Ubuntu 24.04.4 LTS (noble) Affected: linux-image-7.0.0-30-generic (7.0.0-30.30~24.04.1) Working: linux-image-7.0.0-29 generic (7.0.0-29.29~24.04.2) Hardware: MediaTek MT7922 WiFi/BT combo (lspci: Network controller MEDIATEK Corp. MT7922; lsusb: 0489:e0e0 Foxconn/Hon Hai Wireless_Device) Result of lspci-vnvn : To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2164844/+subscriptions