linux-kernel - Re: Thinkpad T61 - Fan running a lot of time

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20090325012925.GA30554@khazad-dum.debian.net>
Date:	Tue, 24 Mar 2009 22:29:25 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	"Renato S. Yamane" <yamane@...mondcut.com.br>
Cc:	LKML <linux-kernel@...r.kernel.org>, jnelson@...poni.net
Subject: Re: Thinkpad T61 - Fan running a lot of time

On Tue, 24 Mar 2009, Renato S. Yamane wrote:
> # echo level 7 > /proc/acpi/ibm/fan
> bash: echo: write error: Invalid argument
>
> How can I change fan level?

Read the driver documentation, at Documentation/laptops/thinkpad-acpi.txt.
Fan control is locked by default, for hardware safety reasons.  The docs
tell you why, how to use the fan control interface, and how to unlock it.

Also, I suggest you get used to the hwmon fan control interface on /sys,
procfs is going away sooner or later...

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/