[ltp] X61s and fan speed < level 1

[Thomas Kahle]

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... and I am using the 2.07 BIOS with 1.03 EC

Thomas Kahle wrote:
| Hi,
|
| I have investigated a bit on this too.
| On my x61s the fan is working perfectly for about 10 minutes (meaning
| that it switches OFF again if I dont use the machine), then it just goes
| on and stays on at approx 3800rpm.
| I think this is a problem with the temperature thresshold of the miniPCI
| wlan.
| If I monitor the temperatures then you can see that in this 10 minutes
| the temperatures no 2 and 3 in the sensor output from thinkpad-acpi go
| up to approx 43. Then the fan keeps rotating at level 4 (3800rpm), but
| this appearently does not cool the wlan-device since it is located in a
| totally different location, so the fan stays on.
|
| In Windows vista there is some workaround installed. The fan goes off
| again, and seems mostly CPU-temperature contrlled. (Although i did not
| test too much there)
|
| I now use the fan-control scripts from thinkwiki and i raised the lower
| threshold of the 2nd and 3rd sensor to 45 degrees. Now they operate at
| exactly the same temperature like whith bios controlled fan, only that
| the fan stays off most of the time, when the computer is idle...
|
| Did anyone contact Lenovo about this ? I'd love to know how much the
| bios directly controls and if vista has some "proprietery" fan control
| built in... ?
|
| thanks
| Thomas
|
| Günther Starnberger wrote:
| | Hello,
| |
| | I have a "problem" with the fan speed of a X61s:
| |
| | If I'm using the (default) "level auto" mode in /proc/acpi/ibm/fan, the
| | fan runs most of the time at around 3800 to 4400 rpm (at the beginning
| | the fan only runs for some minutes, and after some time it keeps
| | running). However, sometimes (especially when I boot the system
| | immediately after shutting it down), the fan starts with 3200 to
3400 rpm
| | and keeps running at this lower speed.
| |
| | I'd like to somehow force the system into this slow fan speed without
| | rebooting until it works (especially as ~3300 rpm seems to be enough to
| | keep the system cool, the temperature of the CPU is currently stable at
| | 41 degree). However, "level 1" in the proc interface seems to be equal
| | to about 3800 rpm, so I can't set a speed of less than 3800 (except if I
| | use "level 0").
| |
| | Any ideas how it could be possible to manually set the fan speed to
| | ~3300 rpm? Do other experience the same problem on a X61s?
| |
| | bye,
| | Guenther
|
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