From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Date: Sat, 14 Feb 2015 15:12:20 +0000 Subject: Re: [lm-sensors] hwmon strangeness, no fan control on w83627dhg Message-Id: <20150214151220.GA24611@amd> List-Id: References: <20150108202919.GA25118@amd> In-Reply-To: <20150108202919.GA25118@amd> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lm-sensors@vger.kernel.org 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 _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors