Test on WVB4-DVT2-A2, BIOS 1.2.0. reboot 50 times consecutively. Didn't see consecutive Bluetooth tx timeout.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.14 in Ubuntu. https://bugs.launchpad.net/bugs/1965467 Title: Need to reset MT7921 BT when the firmware hang or command no response Status in HWE Next: New Status in linux-oem-5.14 package in Ubuntu: Invalid Status in linux-oem-5.14 source package in Focal: Fix Committed Bug description: [Impact] Encounter BT command timeout issue when doing reboot test, and BT becomes unusable. Mar 15 22:04:44 u-Inspiron-15-3525 kernel: [ 463.633675] usb 3-4: reset high-speed USB device number 3 using xhci_hcd Mar 15 22:04:45 u-Inspiron-15-3525 kernel: [ 465.027012] Bluetooth: hci0: command 0x2005 tx timeout Mar 15 22:04:47 u-Inspiron-15-3525 kernel: [ 467.043176] Bluetooth: hci0: command 0x2041 tx timeout [Fix] Backport below 2 commit from v5.15-rc1 fix this issue e947802657cb Bluetooth: btusb: Support Bluetooth Reset for Mediatek Chip(MT7921) 0b10c8c84c0c Bluetooth: btusb: Record debug log for Mediatek Chip. [Test] Verified on the problem machine, and confirmed it works [Where problems could occur] It adds a new function to cmd_timeout callback, so it won't affect old behaviors. This only affects the chip which has command timeout issue, and could reset the chip when encounter the issue. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1965467/+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
