Public bug reported:
[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.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Tags: oem-priority originate-from-1965199 somerville
** Also affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Status: New => In Progress
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem-5.14 (Ubuntu)
Status: New => Invalid
** Tags added: oem-priority originate-from-1965199 somerville
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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:
In Progress
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
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