I while ago I installed PowerTop on my server. PowerTop (Intel) is an awesome utility if you’re looking into the power consumption of you computer. It’s even cooler (literately) if you use it on a laptop because i says how much power you’re drawing from the battery in watt/hour and gives you ton’s of information what is causing that battery drain you’re experiencing. I used it on my server and back then in didn’t noticed it, but after updating it an hour ago to the latest release it caught my eye that the USB devices/Controller is consuming 100% of the power usage:
Not something really important because the USB power capacity is pretty limited anyway:
[21:41][martin@kvm:~]$ sudo lsusb -v|grep -i maxpower
MaxPower 0mA
MaxPower 0mA
MaxPower 0mA
MaxPower 0mA
MaxPower 100mA
MaxPower 100mA
But probably “irritating” at best for a guy in IT. How to fix this?