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#1 2007-07-20 09:17:49

Obi-Lan
Member
From: Finland
Registered: 2007-05-23
Posts: 179

Lenovo V100, putting more RPMs to CPU fan when running low GHzs?

I have power saving work nicely, both cores are running at 1GHz when idle. But this laptop tends to run quite hot. Its running hot also in Vista (yuck) so I doubt that heat will break this so easily. But its not nice when bottom of this thing is almost burning my hand. I noted that CPU cooler is running quite slow RPMS when CPU load is slow I wondered if I could speed it up.

Any ideas where to start looking?

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#2 2007-07-22 20:49:50

CaspianXI
Member
Registered: 2007-05-29
Posts: 59

Re: Lenovo V100, putting more RPMs to CPU fan when running low GHzs?

Hi, Obi-Lan.

Is this what you're looking for?
http://www.thinkwiki.org/wiki/How_to_control_fan_speed

~CaspianXI

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#3 2007-07-23 12:27:41

Obi-Lan
Member
From: Finland
Registered: 2007-05-23
Posts: 179

Re: Lenovo V100, putting more RPMs to CPU fan when running low GHzs?

I dont think its gonna work because I got el cheapo lenovo without thinkpad badge

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#4 2007-07-23 13:21:18

iphitus
Forum Fellow
From: Melbourne, Australia
Registered: 2004-10-09
Posts: 4,927

Re: Lenovo V100, putting more RPMs to CPU fan when running low GHzs?

give it a shot at least, you'll never know.

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#5 2007-07-23 13:28:38

FeatherMonkey
Member
Registered: 2007-02-26
Posts: 313

Re: Lenovo V100, putting more RPMs to CPU fan when running low GHzs?

I think you may be right, found these bits. None good, something about a bug in the bios as this thread.

http://ubuntuforums.org/showthread.php?t=381611 Looking at this thread, it seems it may be possible but not sure the solution is one you want to take(Think you need a kernel hacker friend or be a kernel hacker.) Though from the look of things you'd be helping quite a few people seems your not alone.

As mentioned in the thread it was bug reported here, http://bugzilla.kernel.org/show_bug.cgi?id=8713 but I suspect it may look like a bios problem though. As this seems to of been reported a 4 months ago but with quite a late kernel. i.e 1 before the next release for Arch's 2.6.22. Also from the ubuntu thread it seems to be happening cross distro as well.

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#6 2007-07-23 14:34:39

Obi-Lan
Member
From: Finland
Registered: 2007-05-23
Posts: 179

Re: Lenovo V100, putting more RPMs to CPU fan when running low GHzs?

Well it gives "no such device" error when I modprobe ibm_acpi. I also got /proc/acpi/fan folder empty. I have latest BIOS. Last night I installed Gentoo desktop to that laptop and in morning after allnight compiling it was still running so it doesn't actually overheat. Weird.

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