[PATCH 0/1][SRU][B][D][E][Unstable] BT advertising packet wakes up the system from S3 and suspend-to-idle

AceLan Kao acelan.kao at canonical.com
Tue Sep 17 08:21:50 UTC 2019


BugLink: https://bugs.launchpad.net/bugs/1844247

[Impact]
The new feature added by below commit let BT device to wake up the system
from S3 or s2idle.
   a0085f2510e8 ("Bluetooth: btusb: driver to enable the usb-wakeup feature")
But this feature also wakes up the system randomly from an unpaired BLE
device by its advertising packets.

[Fix]
There is no easy way to fix this and requires firmware update, so current
solution for this is to revert it.
   1ffdb51f28e8 ("Revert "Bluetooth: btusb: driver to enable the usb-wakeup feature"")

[Test]
Verified on machines which has paired BLE devices, and can't be waken up by
BT devices after entered suspended.

[Regression]
Yes, it reverts the feature by waking up system from s2idle by paired BT
devices, but this feature introduces regression, so I'd suggest to revert it.

Mario Limonciello (1):
  Revert "Bluetooth: btusb: driver to enable the usb-wakeup feature"

 drivers/bluetooth/btusb.c | 5 -----
 1 file changed, 5 deletions(-)

-- 
2.17.1




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