Hi Bastien, On Tue, Oct 17, 2017, Bastien Nocera wrote: > The Surface 3 pen (part of the 2nd generation of Surface pens[1]) uses > Bluetooth LE for its top button, which one can assign to a function, > usually a note taking application on Windows. > > After pairing, bluez throws away all the characteristics, UUIDs and > other properties it gathered[2]. > > Subsequent attempts at pressing the pen button just throws a wobbly[3]. > > Any ideas? This apparently used to work, and there's some very hacky > solutions for those devices: Do you happen to have a btmon log of the pairing? The reason could e.g. be that the device doesn't set the bonding flag (in which case our discarding of information is at least specification-wise correct). The HCI log you posted seems to be a reconnection when pairing has already happened. Also, please avoid using hcidump since it does a worse job of decoding stuff (especially newer protocol features). Johan -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
