I have also seen this (as in #26) for Kubuntu 16.04 upgraded from 14.04.4 on HP EliteBook 2560p. I did not see this on Lenovo X1 Carbon upgraded from Kubuntu 15.10.
I have also seen this (as in #26) for Kubuntu 16.04 upgraded from 14.04.4 on HP EliteBook 2560p.
I did not see this on Lenovo X1 Carbon upgraded from Kubuntu 15.10.