From: Pavel Machek <pavel@ucw.cz>
To: lm-sensors@vger.kernel.org
Subject: Re: [lm-sensors] hwmon strangeness, no fan control on w83627dhg
Date: Sat, 14 Feb 2015 15:12:20 +0000 [thread overview]
Message-ID: <20150214151220.GA24611@amd> (raw)
In-Reply-To: <20150108202919.GA25118@amd>
Hi!
> >>But it seems hardware should be backwards-compatible...
> >
> >Ok, it seems it is. But by default it starts in (non-compatible) smart
> >fan III+ mode. I can do port(0x15e) &= ~0x20 to kick it back into
> >compatible mode, and I can then control CPU fan speed in 800..1700 RPM
> >range as expected; but my goal was to stop the fan to make the machine
> >quiet... No success with that so far.
>
> Not all CPU fans can be stopped. Maybe that is the case here ?
All the CPU fans can be stopped, with enough force :-).
Trouble is, I'd like to stop this one with software, and that might
not be possible. (I wonder how they do it? Clearly fan _is_ connected
to the PWM output somehow. Do they have second, hard-coded PWM
generator and logical OR on board...?)
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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prev parent reply other threads:[~2015-02-14 15:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-08 20:29 [lm-sensors] hwmon strangeness, no fan control on w83627dhg Pavel Machek
2015-01-08 20:32 ` David Hubbard
2015-01-08 21:17 ` Pavel Machek
2015-01-08 22:38 ` Jean Delvare
2015-01-08 22:58 ` Pavel Machek
2015-01-12 7:22 ` Jean Delvare
2015-01-12 8:36 ` Pavel Machek
2015-01-12 16:54 ` Pavel Machek
2015-02-13 18:26 ` Pavel Machek
2015-02-14 10:56 ` Pavel Machek
2015-02-14 14:37 ` Guenter Roeck
2015-02-14 15:12 ` Pavel Machek [this message]
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