From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phillip Susi Subject: Re: Using intel_pstate Date: Sat, 22 Feb 2014 23:11:50 -0500 Message-ID: <53097506.8020407@ubuntu.com> References: <5309294E.2090706@ubuntu.com> <9891809.rXh9YKnm5H@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120]:38164 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752398AbaBWELv (ORCPT ); Sat, 22 Feb 2014 23:11:51 -0500 In-Reply-To: <9891809.rXh9YKnm5H@vostro.rjw.lan> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: "linux-acpi@vger.kernel.org" -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 02/22/2014 08:23 PM, Rafael J. Wysocki wrote: > On Saturday, February 22, 2014 05:48:46 PM Phillip Susi wrote: >> The intel_pstate driver says it should be the preferred driver >> on sandy bridge systems, but my system is using the acpi p state >> driver instead. According to the cpufreq Makefile this appears >> to be intended as it is placed first in the link order. Why is >> this and how can I make sure the intel_pstate driver is used >> instead? > > Do you have CONFIG_X86_INTEL_PSTATE=y set in your .config? Nevermind.. turns out Ubuntu has a patch to disable it by default and you have to explicitly pass intel_pstate=enable to turn it on. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCgAGBQJTCXUCAAoJEI5FoCIzSKrwqzQH/iS4frc3VZ+DjrtM7Os5Nm/w ZbZQgq70pXYdH3LIC3cR8PUefKE/h5sIPt6uM0t+GJVVfCpVItiviGhFd0Qvp6Lv N7yj5r4up1RQJDpWcClLpytg5B4euWTQBBC4ayqGWh3rX32sVu9uRoZznjAstEKd c+I/gH7v3f+cnvABqpOFsk/YE/LfLmyqOS+g7N3Syf9Q43WsnRo/vu9Z1q8f3nwz T238VZXir3ElcofH+DmtZR7pDNeNObl1nfYlPgT3NDlvvygMZ/q3su/noJzcH3JF hKbdCBtMwyxWcVWRSf/e20ZoJIZNksDt1SKLWCI/SFN1+OlFUvpUVYQmhbSxYZQ= =xEbX -----END PGP SIGNATURE-----