I'm using PowerTop v2.1 in Ubuntu 13.04 and I'm getting some pretty strange readings. I've already run
powertop --calibrate too. The main screen reads this:
As you can see, the power estimates do add up to about 12.8W, perhaps a bit more. However, the device 'USB device: USB2.0-CRW (Generic)' is reporting a shocking 8.7W of usage. I believe this is the SD card reader on my laptop, I'd like to try to disable it but am not sure how.
But I'm also fairly certain this number can't be right - even at 100% usage I don't think it's going to use 8.7W, and there's no way that power hogs like
chromium-browser and perhaps
compiz are using less than 1W.
Can anyone offer their thoughts about what might be wrong and what steps I can take to reduce power usage and/or get PowerTop to report correctly?