Date: Thu, 11 Oct 2007 11:02:45 +1000 From: Norberto Meijome <freebsd@meijome.net> To: Lars Engels <lme@FreeBSD.org> Cc: FreeBSD Mobile ML <freebsd-mobile@freebsd.org> Subject: Re: Management of Thermal Message-ID: <20071011110245.60c5cda5@meijome.net> In-Reply-To: <20071008154116.0o3hvbyxggk400k0@0x20.net> References: <20071008172756.2aed69e7@meijome.net> <20071008173604.1e449ca2@meijome.net> <20071008111601.kfrb6qt8isw4owc0@0x20.net> <20071008203558.022fd258@meijome.net> <20071008203733.3128f3b6@meijome.net> <20071008154116.0o3hvbyxggk400k0@0x20.net>
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On Mon, 08 Oct 2007 15:41:16 +0200 Lars Engels <lme@FreeBSD.org> wrote: > Do you have Windows installed on that Notebook? How warm does the CPU > get there? Or with a Linux live CD? hey :) trying to follow up each suggestion as it arrived.... I tried Knoppix (5.1.1, 2007-01-04, kernel 2.6.19, after trying with knoppix 3.8 and realising it was a bit old...though not that much after all). My knowledge of linux's default support is a bit limited - it seems cpu throttling (the equivalent of powerd) is not enabled by default, so the core temperature in my laptop was hovering around 80. (compared to 54 right now under freebsd with some minimal configuration outside of defaults) Anyway, I found the following pages which are quite interesting: http://www.thinkwiki.org/wiki/How_to_control_fan_speed ThinkPad Z60t, Z60m (fan levels RPM: 1-2 = ~1700, 3-5 = ~2800, 6-7 = ~3500) http://forum.thinkpads.com/viewtopic.php?p=158780&sid=f35af9a2972edda7460c433ffa75e75e refers to pushing fans to 4.5K, and to what normal behaviour is https://sourceforge.net/project/showfiles.php?group_id=153962 referred from the previous post http://www.thinkwiki.org/wiki/How_to_control_fan_speed the last one was a great one. It describes the latest support for fan control in linux' acpi_ibm. Including how to enable it in experimental mode for older kernels (such as the one Knoppix runs). so, i tried this : http://www.thinkwiki.org/wiki/How_to_control_fan_speed#Using_a_stock_kernel and it worked a treat. The fan kicked off nicely... and seriously aggressively when disengaged (similar to how the fan goes when you just power up the laptop). So it seems these guys + gals @ penguin land are onto something good. Does anyone know if their work can be leveraged for *BSD ? or maybe this support is already in -CURRENT? Cheers, B _________________________ {Beto|Norberto|Numard} Meijome "Build a system that even a fool can use, and only a fool will want to use it." George Bernard Shaw I speak for myself, not my employer. Contents may be hot. Slippery when wet. Reading disclaimers makes you go blind. Writing them is worse. You have been Warned.
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