From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Pan Subject: Re: [PATCH] intel_idle: work around errate VLP52 on Baytrail CPUs Date: Wed, 11 Jan 2017 15:22:44 -0800 Message-ID: <20170111152244.360e8a82@jacob-builder> References: <838trb233m.fsf@echidna.jochen.org> <83ful9yue7.fsf@echidna.jochen.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mga09.intel.com ([134.134.136.24]:63265 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750955AbdAKXVc (ORCPT ); Wed, 11 Jan 2017 18:21:32 -0500 In-Reply-To: Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Len Brown Cc: Vincent Gerris , Hans de Goede , "Rafael J. Wysocki" , Jochen Hein , Linux PM , jacob.jun.pan@linux.intel.com, Vinod Koul , "Prusty, Subhransu S" On Wed, 11 Jan 2017 18:14:12 -0500 Len Brown wrote: > Re: powertop > > turbostat is more useful. The pre-release I uploaded to the bug > report includes some baytrail specific support: > > https://bugzilla.kernel.org/show_bug.cgi?id=109051#c661 > > > I saw your patch for auto-demotion, I will test it and report > > within a few days. I will also do further testing with the 4.9 > > kernel. I hope we can get things stable one way or the other :). > > Current thinking is that we have multiple issues here, and enabling > auto-demotion > simply hides the actual root causes. > > Sound is one known root cause, as Jacob pointed out. > Hopefully we'll have a fix for that one shortly. > +Vinod & Subhransu Could you send out Baytrail VLP70 SST driver workaround patch for testing? > I'm testing w/o sound, and still can provoke a failure in under 30 > minutes. > > Len Brown, Intel Open Source Technology Center [