On Fri, Oct 09, 2020 at 04:40:45PM +0200, Benjamin Berg wrote: > From: Benjamin Berg <bberg@xxxxxxxxxx> > > Hi all, > > so, I kept running in an issue where the UCSI port information was saying > that power was being delivered (online: 1), while no cable was attached. > > The core of the problem is that there are scenarios where UCSI change > notifications are lost. This happens because querying the changes that > happened is done using the GET_CONNECTOR_STATUS command while clearing the > bitfield happens from the separate ACK command. Any change in between will > be lost. > > Note that the problem may be almost invisible in the UI as e.g. GNOME will > still show the battery as discharging. But some policies like automatic > suspend may be applied incorrectly. > > Cc: Hans de Goede <hdegoede@xxxxxxxxxx> > Cc: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > > Benjamin Berg (2): > usb: typec: ucsi: acpi: Always decode connector change information > usb: typec: ucsi: Work around PPM losing change information Do these need to be backported to stable kernel releases? If so, how far back? thjanks, greg k-h
