From mboxrd@z Thu Jan 1 00:00:00 1970 From: Henrique de Moraes Holschuh Subject: Re: [PATCH] intel_idle: Don't use on Lenovo Ideapad S10-3t Date: Sun, 8 Nov 2015 17:20:16 -0200 Message-ID: <20151108192016.GA7063@khazad-dum.debian.net> References: <1446499360-31984-1-git-send-email-ville.syrjala@linux.intel.com> <1A7043D5F58CCB44A599DFD55ED4C9484693D228@fmsmsx115.amr.corp.intel.com> <20151104162100.GT4437@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <20151104162100.GT4437@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Cc: "Brown, Len" , "Wysocki, Rafael J" , "linux-pm@vger.kernel.org" , "linux-kernel@vger.kernel.org" List-Id: linux-pm@vger.kernel.org On Wed, 04 Nov 2015, Ville Syrj=E4l=E4 wrote: > On Tue, Nov 03, 2015 at 03:04:21AM +0000, Brown, Len wrote: > > > Lenovo Ideapad S10-3t hangs coming out of S3 with intel_idle. > > > The two workaround that seem to help are "intel_idle.max_cstate=3D= 0" > > > or "nohz=3Doff highres=3Doff". > > >=20 > > > At a first glance quirk_tigerpoint_bm_sts() seemed promising, but > > > even when moved to early_resume it didn't do anything. > > >=20 > > > I have no idea what's wrong here, so let's just disable intel_idl= e > > > for these machines using a DMI match. > >=20 > > Ville,=20 > >=20 > > It is great that several workarounds have been discovered. > >=20 > > But it would be better to get a good idea of the root-cause > > before permanently ignoring the problem via a new > > black-list in the upstream kernel. > >=20 > > Is it possible for you to file a bug at bugzilla.kernel.org > > against Product: power-management; component: intel_idle? >=20 > https://bugzilla.kernel.org/show_bug.cgi?id=3D107151 This is a shot in the dark, but... The Atom N450 public errata sheet is nightmare fuel, and Ville's Ideapa= d is running that hellish processor on outdated microcode. http://www.intel.com/content/dam/www/public/us/en/documents/specificati= on-updates/atom-processor-n400-specification-update.pdf Ville, you might want to insure you're at the latest BIOS for the S10-3= t: http://support.lenovo.com/us/en/products/laptops-and-netbooks/ideapad-s= -series-netbooks/ideapad-s10-3t/downloads/DS010786 (don't bother with changelogs to make any sort of update-or-not decisio= ns: Lenovo changelogs are known to often be incomplete). I also strongly recommend that you should install your distro's microco= de update package: your microcode should have been revision 0x107 or highe= r, it has been in the public microcode distribution since Q2/Q3-2010... Now, as I said, this is all a shot in the dark, and it might not help a= t all with the hangs. But it looks like something worth trying... --=20 "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh