Hello linux-acpi user and developers,
I'm using Ubuntu Linux 7.10 with kernel 2.6.22-14-generic and I have
some strange problem with ACPI, therm and fan control.
I use ubuntu since Warty 4.10 and is the same from that distro (and so
that kernel), I think it's a bug in linux kernel or acpi to control
the fan speed of a lots of amilo fujitsu siemens laptop
so I think it is very important to solve.
First of all, after CPU makes some works, the fan is at max speed
making a horrible noise and the /proc fs tells me that the CPU
thempertaure is
always 75°C; that is too for a CPU started from 10 min to work: in
Windows with particulare software tool and the right acpi the CPU tmp
goes from 46°C to 55°C max.
So how could I make the acpi tell the right temp. and to control the
speed of the fan?
I read to decompile that DSTD table via intel compiler. I did it, but
I am not able to rewirte the right DSTD.
For more details see my ubuntu post in ubuntuforums [1]
and also a post in amilo-forum [2]
I also think that this bug (of all amilo) is the same as that
launchpad bug #57617 [3]
or the closed kernel linux bug [4]
Here some listings:
$ ls /proc/acpi/
ac_adapter button event info sleep wakeup
alarm dsdt fadt power_resource thermal_zone
battery embedded_controller fan processor video
$ ls /proc/acpi/fan
$
In fan proc it is not presente notghins so I CAN'T force fan speed like
echo -n 3 > /proc/acpi/fan/FAN/state
or like scripts as this found in the net
$ acpi -V
Thermal 1: ok, 75.0 degrees C
AC Adapter 1: on-line
$ ls /proc/acpi/thermal_zone/THRM/*
/proc/acpi/thermal_zone/THRM
/cooling_mode
/proc/acpi/thermal_zone/THRM/polling_frequency
/proc/acpi/thermal_zone/THRM/state
/proc/acpi/thermal_zone/THRM/temperature
/proc/acpi/thermal_zone/THRM/trip_points
$ cat /proc/acpi/thermal_zone/THRM/cooling_mode
<setting not supported>
If you want to ask me some ls or dmesg
[1] http://ubuntuforums.org/showthread.php?t=600891
[2] http://www.amilo-forum.com/topic,1223,b9d6c29641ad7caaf81b94d5e16f1469,-fan-control-on-amilo-series-with-linux.html
[3] https://bugs.edge.launchpad.net/ubuntu/+source/acpi/+bug/57617
[4] http://bugzilla.kernel.org/show_bug.cgi?id=5670
--
Iacopo Masi
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