don't use notification flags with HID++ 2.0 devices

lib/logitech/unifying_receiver/hidpp10.py

@@ -177,6 +177,11 @@ def get_firmware(device):
 
 
 def get_notification_flags(device):
+	if device.kind:
+		p = device.protocol
+		if p is None or p >= 2.0:
+			return
+
 	flags = device.request(0x8100)
 	if flags is not None:
 		assert len(flags) == 3
@@ -184,6 +189,11 @@ def get_notification_flags(device):
 
 
 def set_notification_flags(device, *flag_bits):
+	if device.kind:
+		p = device.protocol
+		if p is None or p >= 2.0:
+			return
+
 	flag_bits = sum(int(b) for b in flag_bits)
 	result = device.request(0x8000, 0xFF & (flag_bits >> 16), 0xFF & (flag_bits >> 8), 0xFF & flag_bits)
 	return result is not None

lib/logitech/unifying_receiver/hidpp20.py

@@ -129,7 +129,7 @@ class FeatureCallError(_KwException):
 class FeaturesArray(object):
 	"""A sequence of features supported by a HID++ 2.0 device."""
 	__slots__ = ('supported', 'device', 'features')
-	assert int(FEATURE.ROOT) == 0x0000
+	assert FEATURE.ROOT == 0x0000
 
 	def __init__(self, device):
 		assert device is not None

lib/logitech/unifying_receiver/receiver.py

@@ -167,7 +167,7 @@ class PairedDevice(object):
 	def enable_notifications(self, enable=True):
 		"""Enable or disable device (dis)connection notifications on this
 		receiver."""
-		if not self.receiver or not self.receiver.handle:
+		if not self.receiver or not self.receiver.handle or self.protocol >= 2.0:
 			return False
 
 		if enable: