Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754196AbcCNBja (ORCPT ); Sun, 13 Mar 2016 21:39:30 -0400 Received: from mail-ob0-f172.google.com ([209.85.214.172]:33148 "EHLO mail-ob0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752239AbcCNBjX (ORCPT ); Sun, 13 Mar 2016 21:39:23 -0400 MIME-Version: 1.0 From: Andy Lutomirski Date: Sun, 13 Mar 2016 18:39:03 -0700 Message-ID: Subject: C1E auto-promotion suspend/resume To: Len Brown , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 384 Lines: 12 Hi- By BIOS (1.2.3 on a Dell XPS 13 9350) seems to want to enable C1E auto-promotion (ugh!), which results in this difference across suspend/resume according to turbostat: -cpu3: MSR_IA32_POWER_CTL: 0x0024005d (C1E auto-promotion: DISabled) +cpu3: MSR_IA32_POWER_CTL: 0x0024005f (C1E auto-promotion: ENabled) Should intel_idle learn to re-disable idle promotion on resume? --Andy