[ltp] Noisy fan on T42

[Konstantin Filtschew]

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hi,

try to setup the cpu speed manually as I do this for working with
battery or for quit working:

-------------------------- script battery.sh -----------------------
#!/bin/bash
echo 600000 >  /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo powerave >  /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
-------------------------- script battery.sh -----------------------

Maybe you have a opengl screensaver or other opengl stuff. 1 min with
opengl on and my gfx card (Radeon 7500) needs up to 20min to cool down.

I'll think about more reasons, will tell you, if I find something.

Can you post us your dmesg.log output, maybe will find there something.
Is your dma on for the hardrive, so the cpu is always working to get the
data through cpu instead to put it directly into the ram.

"hdparm -d /dev/hda" output?

Greetz

Konstantin




On Mon, 14 Mar 2005 10:05:25 -0600
Alejandro Bonilla <abonilla@linuxwireless.org> wrote:

>=20
>=20
> Konstantin Filtschew wrote:
>=20
> >hi,
> >
> >Linux doesn't control the fan, it's the ibm bios, which control the
fan.
> >We try only to reduce the temperature through bios, so the bios stops
> >the fan, thats the problem. Controlling the fan is still not possible
> >for T40 and later as far as I know.
> > =20
> >
> I can only say this is the same case for me. I have a T42 with the
stock=20
> IBM bios and works perfectly. The only time I can hear the Fan is when

> the CPU THM is pretty hot. The BIOS notices it's so hot that it makes=20
> the Fan hit the CPU with all it has. (This happends when I use the PC=20
> plugged and in the bed, which used to put my CPU at 1800mhz and with
few=20
> space for the air to leave the laptop casing) anyway. It works for me=20
> here. You should test it this way.
>=20
> 1. make sure the PC is running in powersaver which should be 600mhz,=20
> then use laptop_mode and make sure nothing gets heated up.
> 2. At this point , you _should not_ hear the fan working heavily.
>=20
> If you do, notice on boot in what moment this is happening! Make sure
it=20
> is not something you did in a previous attempt to get things working=20
> differently
>=20
> >
> >Greetz
> >
> >Konstantin
> >
> >
> >
> >On Mon, 14 Mar 2005 10:36:45 -0500
> >"Alexandru D. Salcianu" <salcianu@MIT.EDU> wrote:
> >
> > =20
> >
> --=20
> The linux-thinkpad mailing list home page is at:
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad


----------------------------=20
Building an operation system without source code,
is like buying a  self assemble space shuttle without
instructions.

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