From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============5491579247613057804==" MIME-Version: 1.0 From: Arjan van de Ven Subject: Re: [Powertop] USB devices get wrong power use values Date: Sun, 13 Oct 2013 08:33:51 -0700 Message-ID: <525ABD5F.6030001@linux.intel.com> In-Reply-To: 20130922235400.GE1886@merlins.org To: powertop@lists.01.org List-ID: --===============5491579247613057804== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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 t= hat 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 (Y= ubico) >> 8.13 W 100.0% Device USB device: Integrated Camera (C= hicony Electronics Co., Ltd.) having a USB device active also generally makes the CPU/etc use much more p= ower, which Powertop "charges" to the USB device in question. 8 Watts sounds entirely reasonable for that to me... --===============5491579247613057804==--