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Groups > linux.debian.user > #239179

Re: smart fans

From <tomas@tuxteam.de>
Newsgroups linux.debian.user
Subject Re: smart fans
Date 2021-08-22 16:30 +0200
Message-ID <COWE2-2pS-7@gated-at.bofh.it> (permalink)
References (4 earlier) <CORbl-7vJ-33@gated-at.bofh.it> <CORuF-7Ca-3@gated-at.bofh.it> <COVoD-1JB-37@gated-at.bofh.it> <COW1j-1WE-5@gated-at.bofh.it> <COWkG-2iK-11@gated-at.bofh.it>
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On Sun, Aug 22, 2021 at 04:02:48PM +0200, Emanuel Berg wrote:
> tomas wrote:
> 
> > I disagree. The thing poses [1] as a DC motor (2 pins power,
> > one tacho). I don't think you get too much control over RPM
> 
> That's what you get with the 4th wire/pin? A sensor to
> read RPM?

Re-read the Wikipedia I quoted: according to that, that's the
third pin of the three-pin thingie (aka tacho, like bikes have :)
The *fourth* pin is PWM, i.e. speed control.

Debate's up whether you can control a three-pin fan by regulating
its DC voltage (the motherboard/chipset would have to provide
that, of course). Some of us say it can be done, rhkramer says
it has (at least) been done.

> "What you can't measure, you can't control"

...it rather controls you ;-)

I think the tacho originally was important to have a "live signal",
in the times fans were more unreliable. If it gets stuck because
the bushing went bad, software can take action before the CPU goes
in flames. These days things fail more gracefully at several levels.

Cheers
 - t

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Thread

smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 02:00 +0200
  Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 02:50 +0200
    Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 03:10 +0200
      Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 05:00 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 05:10 +0200
      Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 05:10 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 05:30 +0200
          Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Reco <recoverym4n@enotuniq.net> - 2021-08-22 07:30 +0200
            Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 08:30 +0200
              Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:30 +0200
              Re: FOSS "BIOS" (UEFI) The Wanderer <wanderer@fastmail.fm> - 2021-08-22 12:10 +0200
                Re: FOSS "BIOS" (UEFI) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 13:30 +0200
              Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:20 +0200
                Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:30 +0200
                Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
          FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 07:30 +0200
  Re: smart fans <tomas@tuxteam.de> - 2021-08-22 09:10 +0200
    Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 09:50 +0200
      Re: smart fans <tomas@tuxteam.de> - 2021-08-22 10:00 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:10 +0200
          Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:10 +0200
            Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:20 +0200
          Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:30 +0200
            Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:50 +0200
              Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:10 +0200
                Re: smart fans The Wanderer <wanderer@fastmail.fm> - 2021-08-22 16:10 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:20 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
      Re: smart fans Hans <hans.ullrich@loop.de> - 2021-08-22 17:30 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 17:50 +0200
  Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 09:50 +0200
    Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:00 +0200
      Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:20 +0200
      Re: smart fans <tomas@tuxteam.de> - 2021-08-22 10:30 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:40 +0200
        Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:40 +0200
          Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:40 +0200
            Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:50 +0200
              Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 11:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 11:50 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
                Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-22 11:50 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
              Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-22 11:30 +0200
          Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 11:00 +0200
            Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
              Re: smart fans <tomas@tuxteam.de> - 2021-08-22 15:50 +0200
                Re: smart fans rhkramer@gmail.com - 2021-08-22 16:10 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:50 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:10 +0200
                Re: smart fans <tomas@tuxteam.de> - 2021-08-22 16:30 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
                Re: smart fans Gene Heskett <gheskett@shentel.net> - 2021-08-22 23:10 +0200
                Re: smart fans Gene Heskett <gheskett@shentel.net> - 2021-08-23 00:20 +0200
                Re: smart fans "Thomas Schmitt" <scdbackup@gmx.net> - 2021-08-22 16:30 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 19:00 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 23:10 +0200
                Re: smart fans <tomas@tuxteam.de> - 2021-08-23 10:10 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:10 +0200
                Re: smart fans <tomas@tuxteam.de> - 2021-08-23 21:10 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 21:30 +0200
                Re: smart fans <tomas@tuxteam.de> - 2021-08-23 21:40 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 22:30 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:30 +0200
            Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 22:30 +0200
              Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:20 +0200
      Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 21:30 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 22:00 +0200
          Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-22 23:20 +0200
            Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:40 +0200
              Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 23:50 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-23 00:40 +0200
              Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-23 09:30 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 22:20 +0200
          Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 23:10 +0200
            Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:30 +0200
        Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:50 +0200
          Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 00:10 +0200
            Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 02:00 +0200
              Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 02:10 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 02:40 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 03:00 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 03:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:00 +0200
                Re: smart fans "Andrew M.A. Cater" <amacater@einval.com> - 2021-08-24 18:20 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 23:00 +0200
                Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-23 03:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:00 +0200
              Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 03:20 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:00 +0200
                Re: smart fans "Thomas Schmitt" <scdbackup@gmx.net> - 2021-08-23 22:50 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 23:00 +0200
                Re: smart fans "Thomas Schmitt" <scdbackup@gmx.net> - 2021-08-23 23:30 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:50 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 01:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 02:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 03:00 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 04:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 05:20 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 09:00 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 23:20 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 23:40 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:40 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:20 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 02:10 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 04:00 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 07:30 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 09:50 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-25 00:20 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-25 01:30 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-29 01:00 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-29 12:00 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-09-04 00:10 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-09-04 03:50 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-09-04 04:50 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-09-04 23:00 +0200
                Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-09-07 03:10 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-09-07 23:20 +0200
                Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 11:20 +0200

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