Re: [PATCH] intel_idle: Don't use on Lenovo Ideapad S10-3t
From: Ville Syrjälä
Date: Mon Nov 09 2015 - 05:28:51 EST
On Sun, Nov 08, 2015 at 05:20:16PM -0200, Henrique de Moraes Holschuh wrote:
> On Wed, 04 Nov 2015, Ville Syrjälä 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=0"
> > > > or "nohz=off highres=off".
> > > >
> > > > At a first glance quirk_tigerpoint_bm_sts() seemed promising, but
> > > > even when moved to early_resume it didn't do anything.
> > > >
> > > > I have no idea what's wrong here, so let's just disable intel_idle
> > > > for these machines using a DMI match.
> > >
> > > Ville,
> > >
> > > It is great that several workarounds have been discovered.
> > >
> > > 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.
> > >
> > > Is it possible for you to file a bug at bugzilla.kernel.org
> > > against Product: power-management; component: intel_idle?
> > https://bugzilla.kernel.org/show_bug.cgi?id=107151
> This is a shot in the dark, but...
> The Atom N450 public errata sheet is nightmare fuel, and Ville's Ideapad is
> running that hellish processor on outdated microcode.
> Ville, you might want to insure you're at the latest BIOS for the S10-3t:
Seems to require Windows, so no can do without major pain.
Considering acpi_idle works just fine, I doubt a new BIOS version would
have anything to fix this, except maybe by accident.
> (don't bother with changelogs to make any sort of update-or-not decisions:
> Lenovo changelogs are known to often be incomplete).
> I also strongly recommend that you should install your distro's microcode
> update package: your microcode should have been revision 0x107 or higher, it
> has been in the public microcode distribution since Q2/Q3-2010...
[ 0.000000] microcode: CPU0 microcode updated early to revision 0x107, date = 2009-08-25
[ 0.990876] microcode: CPU0 sig=0x106ca, pf=0x4, revision=0x107
[ 0.990972] microcode: CPU1 sig=0x106ca, pf=0x4, revision=0x107
No help unfortunately.
> Now, as I said, this is all a shot in the dark, and it might not help at all
> with the hangs. But it looks like something worth trying...
> "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
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/