From: Guenter Roeck <linux@roeck-us.net>
To: lm-sensors@vger.kernel.org
Subject: Re: [lm-sensors] Reducing fan speed for w83627ehf
Date: Thu, 28 Jun 2012 03:53:38 +0000 [thread overview]
Message-ID: <20120628035338.GA16191@roeck-us.net> (raw)
In-Reply-To: <CAP3RjSfZQevwuBONgEbA0XaE_aiUik6sDdYY6ZJA+bWmZW1MQw@mail.gmail.com>
On Wed, Jun 27, 2012 at 06:18:09PM -0400, Arun Raghavan wrote:
> Hi,
>
> > I need to get fairly fine grain control on my CPU fan speed for some
>
> > > experiments, but I am currently unable to set the fan speed below 1054
> > RPM.
> > > pwmconfig confirms the same across the divisor range. Processor is
> > i7-2600,
> > > motherboard
> > >
> > > I tried setting pwm2_enable to 1 and pwm2 to 1 manually and I see that
> > the
> > > fan speed varies but the min RPM remains 1054. Info below.
> > >
> > What happens if you write 0 into pwmX ? Also, did you select manual fan
> > speed
> > control ?
> >
> >
> Writing 0 to pwm2 also keeps it at 1054 RPM. I'm setting pwm2_enable to 1,
> isn't that supposed to make it manual? Also, I do see a variation between
> 1054 RM and 2109 RPM (and some steps in between), when I change pwm2. I
> can't get it to spin lower than 1054 RPM though.
>
Maybe that is the lowest fan speed supported by this fan ?
Guenter
> thanks,
> -arun
>
>
> > > so how would be very helpful.
> > >
> > > thanks,
> > > -arun
> > >
> > > root@sandy:/sys/devices/platform/w83627ehf.656# echo 255 > pwm2
> > > root@sandy:/sys/devices/platform/w83627ehf.656# sensors
> > > coretemp-isa-0000
> > > Adapter: ISA adapter
> > > Any pointers on whether it is possible to reduce fan speed further, and
> > if
> > > Physical id 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
> > > Core 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
> > >
> > > nct6775-isa-0290
> > > Adapter: ISA adapter
> > > Vcore: +0.82 V (min = +0.00 V, max = +1.74 V)
> > > in1: +1.12 V (min = +0.00 V, max = +0.00 V) ALARM
> > > AVCC: +3.46 V (min = +2.98 V, max = +3.63 V)
> > > +3.3V: +3.46 V (min = +2.98 V, max = +3.63 V)
> > > in4: +1.06 V (min = +0.00 V, max = +0.00 V) ALARM
> > > in5: +1.05 V (min = +0.00 V, max = +0.00 V) ALARM
> > > in6: +1.08 V (min = +0.00 V, max = +0.00 V) ALARM
> > > 3VSB: +3.41 V (min = +2.98 V, max = +3.63 V)
> > > Vbat: +3.34 V (min = +2.70 V, max = +3.30 V) ALARM
> > > fan1: 0 RPM (min = 0 RPM, div = 128)
> > > fan2: 2109 RPM (min = 0 RPM, div = 128) ALARM <----
> > > fan3: 0 RPM (min = 0 RPM, div = 128)
> > > fan4: 0 RPM (div = 128)
> > > SYSTIN: +31.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor
> > > = CPU diode
> > > CPUTIN: +29.5°C (high = +80.0°C, hyst = +75.0°C) sensor = CPU
> > > diode
> > > AUXTIN: +22.0°C (high = +80.0°C, hyst = +75.0°C) sensor =
> > > thermistor
> > > PECI Agent 0: +45.5°C
> > > cpu0_vid: +2.050 V
> > > intrusion0: OK
> > >
> > > root@sandy:/sys/devices/platform/w83627ehf.656# echo 1 > pwm2
> > > root@sandy:/sys/devices/platform/w83627ehf.656# sensors
> > > coretemp-isa-0000
> > > Adapter: ISA adapter
> > > Physical id 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
> > > Core 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
> > >
> > > nct6775-isa-0290
> > > Adapter: ISA adapter
> > > Vcore: +0.85 V (min = +0.00 V, max = +1.74 V)
> > > in1: +1.12 V (min = +0.00 V, max = +0.00 V) ALARM
> > > AVCC: +3.46 V (min = +2.98 V, max = +3.63 V)
> > > +3.3V: +3.46 V (min = +2.98 V, max = +3.63 V)
> > > in4: +1.06 V (min = +0.00 V, max = +0.00 V) ALARM
> > > in5: +1.05 V (min = +0.00 V, max = +0.00 V) ALARM
> > > in6: +1.08 V (min = +0.00 V, max = +0.00 V) ALARM
> > > 3VSB: +3.41 V (min = +2.98 V, max = +3.63 V)
> > > Vbat: +3.34 V (min = +2.70 V, max = +3.30 V) ALARM
> > > fan1: 0 RPM (min = 0 RPM, div = 128)
> > > fan2: 1054 RPM (min = 0 RPM, div = 128) ALARM
> > > fan3: 0 RPM (min = 0 RPM, div = 128)
> > > fan4: 0 RPM (div = 128)
> > > SYSTIN: +30.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor
> > > = CPU diode
> > > CPUTIN: +29.5°C (high = +80.0°C, hyst = +75.0°C) sensor = CPU
> > > diode
> > > AUXTIN: +22.0°C (high = +80.0°C, hyst = +75.0°C) sensor =
> > > thermistor
> > > PECI Agent 0: +44.5°C
> > > cpu0_vid: +2.050 V
> > > intrusion0: OK
> >
> > > _______________________________________________
> > > lm-sensors mailing list
> > > lm-sensors@lm-sensors.org
> > > http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
> >
> >
_______________________________________________
lm-sensors mailing list
lm-sensors@lm-sensors.org
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
next prev parent reply other threads:[~2012-06-28 3:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-27 18:28 [lm-sensors] Reducing fan speed for w83627ehf Arun Raghavan
2012-06-27 19:40 ` Guenter Roeck
2012-06-27 22:18 ` Arun Raghavan
2012-06-28 3:53 ` Guenter Roeck [this message]
2012-06-28 4:23 ` Arun Raghavan
2012-06-28 5:26 ` Guenter Roeck
2012-06-28 6:31 ` Jean Delvare
2012-06-28 16:20 ` Arun Raghavan
2012-06-28 16:21 ` Arun Raghavan
2012-06-28 16:30 ` Jean Delvare
2012-06-28 17:04 ` Guenter Roeck
2012-06-28 17:18 ` Arun Raghavan
2012-06-28 19:06 ` Guenter Roeck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120628035338.GA16191@roeck-us.net \
--to=linux@roeck-us.net \
--cc=lm-sensors@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.