Bug#546762: thinkfan: Pulsating Thinkpad fan

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Bug#546762: thinkfan: Pulsating Thinkpad fan

Frank Hart-2
Package: thinkfan
Version: 0.5.0.1-1
Severity: wishlist

Various Thinkpad models are subject to the pulsating fan bug(1)
Every few seconds the embedded controller firmware monitors the fan and
adjusts the speed of the fan, resulting in a pulsating noise.

Before thinkfan I used tp-fancontrol which includes a workaround for the
pulsating fan problem(2).

Is it possible to apply the same sort of hack in thinkfan?


(1) http://www.thinkwiki.org/wiki/Problem_with_fan_noise
(2)
http://www.thinkwiki.org/wiki/ACPI_fan_control_script#Comprehensive_bash_script_with_fine_control_over_fan_speed

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.30-1-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages thinkfan depends on:
ii  libc6                         2.9-26     GNU C Library: Shared libraries

thinkfan recommends no packages.

thinkfan suggests no packages.

-- no debconf information



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Bug#546762: thinkfan: Pulsating Thinkpad fan

Evgeni Golov
Hi,

On Tue, Sep 15, 2009 at 05:13:15PM +0200, Frank Hart wrote:
> Various Thinkpad models are subject to the pulsating fan bug(1)
> Every few seconds the embedded controller firmware monitors the fan and
> adjusts the speed of the fan, resulting in a pulsating noise.
>
> Before thinkfan I used tp-fancontrol which includes a workaround for the
> pulsating fan problem(2).
>
> Is it possible to apply the same sort of hack in thinkfan?

Victor has applied a hack for this.
Could you fetch thinkfan from
http://people.debian.org/~evgeni/tmp/thinkfan/
and try to start it with -p (Use the pulsing-fan workaround (for older
Thinkpads). Takes an optional floating-point argument (0 ~ 10s) as
depulsing duration. Default 0.5s.) to see how it behaves?

Regards
Evgeni

--
Bruce Schneier can read and understand Perl programs.



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Bug#546762: thinkfan: Pulsating Thinkpad fan

Frank Hart-2
On Sun, Oct 25, 2009 at 11:00:45AM +0100, Evgeni Golov wrote:
> Victor has applied a hack for this.
> Could you fetch thinkfan from
> http://people.debian.org/~evgeni/tmp/thinkfan/
> and try to start it with -p (Use the pulsing-fan workaround (for older
> Thinkpads). Takes an optional floating-point argument (0 ~ 10s) as
> depulsing duration. Default 0.5s.) to see how it behaves?

Sorry, but in the meantime I've upgraded the bios and the annoying
pulsating noise is a thing of the past. That's all good, but after
installing the thinkfan version of Victor, I can't notice any
difference so I'm afraid I can't be of much help now...

Thanks for your help,
Frank



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Bug#546762: thinkfan: Pulsating Thinkpad fan

Frank Hart-2
In reply to this post by Evgeni Golov
Looks like I was wrong. The pulsating sound wasn't gone, it was just
that the laptop wasn't getting hot enough most of the time. I can
confirm that the patch works for me. I used just -p, so without
seconds specified.

thx,
Frank



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Bug#546762: thinkfan: Pulsating Thinkpad fan

Evgeni Golov
On Sat, Oct 31, 2009 at 07:29:51PM +0100, Frank Hart wrote:
> Looks like I was wrong. The pulsating sound wasn't gone, it was just
> that the laptop wasn't getting hot enough most of the time. I can
> confirm that the patch works for me. I used just -p, so without
> seconds specified.

Great, thanks!
I will upload ASAP then.

--
Bruce Schneier can read and understand Perl programs.



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