HI guys, I'm being bit by this too in Ubuntu 15.10. I have a System76 Lemur (2015, Skylake) and one of my cores is always at 90% or above usage, unless I plug in a USB device, in which case the problem goes away.
I tried installing kernel 4.3 from the mainline repo, but with that kernel, my system won't even boot at all.
HI guys, I'm being bit by this too in Ubuntu 15.10. I have a System76 Lemur (2015, Skylake) and one of my cores is always at 90% or above usage, unless I plug in a USB device, in which case the problem goes away.
I tried installing kernel 4.3 from the mainline repo, but with that kernel, my system won't even boot at all.