For whatever reason the problem is gone today. I really don't understand this since I booted (both hot and cold) several times when trying to "fix" it and everytime kworker -processes started running at ~50% right after the boot. The machine was off whole yesterday and still the problem presented itself in the evening. If the problem comes back I'll try to pull more information from it :| -- Perttu Muurimäki perttu.muurimaki@iki.fi