From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============3955439484728372558==" MIME-Version: 1.0 From: Arjan van de Ven Subject: Re: [Powertop] Package C states over Haswell platform Date: Tue, 28 Oct 2014 09:45:42 -0700 Message-ID: <544FC836.6030506@linux.intel.com> In-Reply-To: 002401cff2cb$1aeaebc0$50c0c340$@gmail.com To: powertop@lists.01.org List-ID: --===============3955439484728372558== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On 10/28/2014 9:20 AM, Rony Ross wrote: > I'm working on DELL E7440 platform (Haswell based) with dual OS: Windows = 8.1 and Ubuntu 14.04.1 (based on 3.13). > When I use Win 8.1, using BLA I get ~90% PC7 when idle. However, when I u= se the Ubuntu, using powertop I get only as high as PC3. > Since it's the same platform, it seems to rule out a HW issue. Any idea w= hat can be the problem? Is Haswell fully supported by powertop? > likely some device is not going to a low power state, which then blocks PC7. Powertop should be able to tell you which device that is --===============3955439484728372558==--