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From: Alex D. <ale...@gm...> - 2006-11-26 02:41:42
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On 11/25/06, Henrique de Moraes Holschuh <hm...@hm...> wrote: > Alex, can we take all ibm-acpi email to > ibm...@li...? > > You can subscribe through > https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel > Already subscribed. > > >Please check if the two fans are showing up on > > >/proc/acpi/power_resource/PFAN and PFA1. You should be able to use it to > > >toggle the fans on and off, and check their state. > > > > They do show up. How do enable/disable them? > > I don't know, you can probably echo "on" or "off" there. Maybe there is > some documentation in google? I didn't find much after a cursory glance. perhaps a quick email to the acpi list will yield the answer. > > > They appear to be off, however, I can still hear a fan running; > > perhaps the CPU fan is separate? > > That depends on how many fans you have in your machine... are there really > three fans? Seems a little excessive for a notebook... fans draw too much > current... I think there's just one. > > > >There is also an EC register named "FANS". It is at offset 0x6c and 0x6d > > >(it is a 16-bit value). Please check ecdump output, it might be the fan > > >tachometer or somesuch. I can add support for it if we reverse engineer > > >how > > >it works. Since there are two fans, it is possible that there are two > > >tachometers with 8-bit size, instead of one of 16-bit size. > > > > Here's the ecdump. What the best method to figure out how the FANS reg > > works? > > Find a way to turn fans on-and-off, and if they are capable of speeding up > or down automatically, cause them to do it and observe what happens to the > values. > Sounds good. Alex |
