On 9/22/2013 4:54 PM, Marc MERLIN wrote:
> So, I asked on the linux-usb list, and one thing I quickly found out is that the
> Watt value given by powertop 2.4 is way off for USB devices:

what makes you think the value is off?

>> Power est.  Events/s    Category       Description
>>    8.18 W    100.0%      Device         USB device: Yubico Yubikey II (Yubico)
>>    8.13 W    100.0%      Device         USB device: Integrated Camera (Chicony Electronics Co., Ltd.)

having a USB device active also generally makes the CPU/etc use much more power,
which Powertop "charges" to the USB device in question.

8 Watts sounds entirely reasonable for that to me...