linux-kernel - Re: v4.8-rc1: thinkpad x60: running at low frequency even during kernel build

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Date:   Sat, 5 Nov 2016 13:22:54 +0100
From:   Pavel Machek <pavel@....cz>
To:     "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "Zhang, Rui" <rui.zhang@...el.com>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        ibm-acpi@....eng.br, ibm-acpi-devel@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org
Subject: Re: v4.8-rc1: thinkpad x60: running at low frequency even during
 kernel build

Hi!

> Under v4.8-rc, behaviour is different: bios_limit goes to 1GHz there
> when temperature is around 84C at the thermal zone. That keeps
> ibm/thermal temperatures under 90C, and no "thermal emergency"
> messages in syslog.

Argh. So v4.9 thermal management does not work.

v4.8 passive thermal management works _too well_, keeping fan at cca
3200 rpm, far below 3700 rpm it can reach. CPU is getting throttled,
and fan is not even running at full speed.

I can manually control the fan with thinkpad_acpi.fan_control=1... I
guess I can write some scripts?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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