When I use 4.8.6-2-default from Factory, I see no such WARNING messages. But networking still doesn't work (I am not sure whether it is related): [ 11.334130] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.3.0-k [ 11.334132] igb: Copyright (c) 2007-2014 Intel Corporation. [ 11.335389] igb: probe of 0000:01:00.0 failed with error -2 [ 11.335860] igb: probe of 0000:02:00.0 failed with error -2