[ltp] Fan-problem-solution-proposal

[Ovidiu Achim]

I set my GPU temperature between 57 and 60. It seems working OK.=20

Cheers,
Ovi

On 5/7/05, Mario Limonciello <mario.mailing@gmail.com> wrote:
> Ovidiu Achim wrote:
>=20
> >Try modprobe ibm-acpi experimental=3D1.
> >
> >Cheers,
> >Ovi
> >
> >On 5/6/05, Bret Comstock Waldow <bwaldow@woosh.co.nz> wrote:
> >
> >
> >>I have a T42 (2378-FVU) running ibm-acpi 0.11.  I don't
> >>have /proc/acpi/ibm/fan.
> >>
> >>I have ibm-acpi loaded as a module.  Should I have the fan entry?
> >>
> >>My fan runs most of the time, but is mercifully quiet.
> >>
> >>Regards,
> >>Bret
> >>
> >>On Fri, 06 May 2005 08:29, Florian Dorpmueller wrote:
> >>
> >>
> >>>For those who like to do something with their fan, I have writen a lit=
tle
> >>>script. You can use it as deamon or start it as local user (therefore =
you
> >>>need to change the rights of /proc/acpi/ibm/fan).
> >>>
> >>>On my R51 this script reduces the fan usage remarkable. Under normal
> >>>circumstances (20 degrees centigrade) I notice about 8 minutes fanless
> >>>working and afterwards around 10 minutes cooling.
> >>>
> >>>Try and enjoy,
> >>>Flori
> >>>
> >>>#!/bin/sh
> >>>#
> >>># fan control-script
> >>>#
> >>># based upon ibm-acpi 0.11
> >>>#
> >>># eliminates anoying "fan always on" in battery mode
> >>># works with hysteresis (DELTA) so that always-turn-on/turn-off is avo=
ided
> >>># fan acivates at MAXTEMP and cools down CPU, GPU etc. to MAXTEMP-DELT=
A
> >>>than the fan is turned off
> >>># furthermore detects if AC is on and gives back fan control to defaul=
t
> >>>behaviour than
> >>>#
> >>># one can change MAXTEMP and DELTA to individual values
> >>># but take care of your THINKPAD don`t melt it!
> >>>#
> >>># have fun!
> >>># Flori 05.05.05
> >>>
> >>>MAXTEMP=3D50
> >>>DELTA=3D4
> >>>
> >>>SWITCHTEMP=3D$MAXTEMP
> >>>
> >>>while [ 1 ];
> >>>do
> >>>   for ac in `sed s/state:// < /proc/acpi/ac_adapter/AC/state`
> >>>     do
> >>>      if [ "$ac" =3D "off-line" ]; then
> >>>          fan=3Dno
> >>>          for temp in `sed s/temperatures:// < /proc/acpi/ibm/thermal`
> >>>            do
> >>>              test $temp -gt $SWITCHTEMP && fan=3Dyes
> >>>            done
> >>>
> >>>          if [ "$fan" =3D "yes" ]; then
> >>>            command=3D'enable'
> >>>            SWITCHTEMP=3D`expr $MAXTEMP - $DELTA`
> >>>          else
> >>>            SWITCHTEMP=3D$MAXTEMP
> >>>            command=3D'disable'
> >>>          fi
> >>>
> >>>        else # ac-adapter on -> set fan control to standard behaviour
> >>>          command=3D'enable'
> >>>        fi
> >>>
> >>>        echo $command > /proc/acpi/ibm/fan
> >>>        sleep 15
> >>>      done
> >>>   done
> >>>
> >>>
> >>
> >>
> >>
> Well my problem at hand now is the GPU is still way too hot that this
> script doesn't take effect:
>=20
> supermario@portablemario ~ $ cat /proc/acpi/ibm/thermal
> temperatures:   35 49 31 81 28 -128 23 -128
>=20
> I'm thinking once we see some good ol' power management put into the ATI
> drivers I won't even have a need for this script period.  Until then I
> just have to cope.
> --
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