From: r.marek@sh.cvut.cz (Rudolf Marek)
To: lm-sensors@vger.kernel.org
Subject: [lm-sensors] Random thoughts on fan speed control
Date: Tue, 05 Sep 2006 07:50:13 +0000 [thread overview]
Message-ID: <44FD2C35.7030804@sh.cvut.cz> (raw)
In-Reply-To: <20060904231231.c7dc7e1f.khali@linux-fr.org>
Hi,
Just quick snip because I gotta work too ;)
> * Reading the F71805F documentation, I learned that the external
> circuitery needed for PWM fan speed control is completely different
> from the one needed for DC fan speed control. So I wonder if it is a
> good idea to let the user change between the two modes. Clearly the
> BIOS should set it right. I tried to switch to DC mode and it had no
> effect at all on my fan (not even on/off). I wonder if it is possible
> to confuse or even damage the hardware by using the wrong mode?
Yes DC/PWM settings were already removed from W83793 and imho not implemented on
EHF too.
You need to know what circuits are onboard -> BIOS should do that for you. If
you want to implement this I would suggest just a kernel param for BIOS fixups.
Rudolf
next prev parent reply other threads:[~2006-09-05 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-04 21:12 [lm-sensors] Random thoughts on fan speed control Jean Delvare
2006-09-05 7:50 ` Rudolf Marek [this message]
2006-09-05 8:50 ` Jean Delvare
2006-09-05 15:01 ` David Hubbard
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