[N150] Silent-Mode Problem, fan is spinning always

[achi]

Hello,
Very happy to have found this forum and website, keep up the great work.
I have a N150 Netbook with Ubuntu 10.04 running.
Installed samsung-tools, all Fn-Keys seem to work, but the fan control doesnt.
Even though I selected Silent-Mode, the fan is running constantly all the time,
a subtle but constant vibration and sound.

samsung-tools --status gives
..
CPU Temperature: 50.0 °C
Fan mode: Silent
..

and pwmconfig:
/usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed

(fan is running always) Battery-time is around 2.5h even though the cpu is at 1Ghz and on lowest backlight,
im not happy with that because the battery lasted about six, seven hours before (Win)
I trief the "Low" and "Auto" settings for fan-control in the bios, but that didnt have any effect
on the fan.

I dont know what to do, happy and grateful for any inspiration. Its frustrating because I know that the fan-control is supported by the Netbook, but how can I get it to run?

Thanks,
Achi

[achi]

I tried lm-sensor before, this is the output, definitely something was detected, I dont really understand if it helped though:

achi@achi:~$ sudo sensors-detect
# sensors-detect revision 5818 (2010-01-18 17:22:07 +0100)
# System: SAMSUNG ELECTRONICS CO., LTD. N150 (laptop)

This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.

Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no): Y
Silicon Integrated Systems SIS5595... No
VIA VT82C686 Integrated Sensors... No
VIA VT8231 Integrated Sensors... No
AMD K8 thermal sensors... No
AMD Family 10h thermal sensors... No
AMD Family 11h thermal sensors... No
Intel Core family thermal sensor... No
Intel Atom thermal sensor... Success!
(driver `coretemp')
Intel AMB FB-DIMM thermal sensor... No
VIA C7 thermal sensor... No
VIA Nano thermal sensor... No

Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no): Y
Probing for Super-I/O at 0x2e/0x2f
Trying family `National Semiconductor'... No
Trying family `SMSC'... Yes
Found `SMSC FDC37M81x Super IO'
(no hardware monitoring capabilities)
Probing for Super-I/O at 0x4e/0x4f
Trying family `National Semiconductor'... No
Trying family `SMSC'... No
Trying family `VIA/Winbond/Nuvoton/Fintek'... No
Trying family `ITE'... No

Some hardware monitoring chips are accessible through the ISA I/O ports.
We have to write to arbitrary I/O ports to probe them. This is usually
safe though. Yes, you do have ISA I/O ports even if you do not have any
ISA slots! Do you want to scan the ISA I/O ports? (YES/no): Y
Probing for `National Semiconductor LM78' at 0x290... No
Probing for `National Semiconductor LM79' at 0x290... No
Probing for `Winbond W83781D' at 0x290... No
Probing for `Winbond W83782D' at 0x290... No

Lastly, we can probe the I2C/SMBus adapters for connected hardware
monitoring devices. This is the most risky part, and while it works
reasonably well on most systems, it has been reported to cause trouble
on some systems.
Do you want to probe the I2C/SMBus adapters now? (YES/no): Y
Using driver `i2c-i801' for device 0000:00:1f.3: Intel 82801G ICH7
Module i2c-i801 loaded successfully.
Module i2c-dev loaded successfully.

Next adapter: intel drm CRTDDC_A (i2c-0)
Do you want to scan it? (YES/no/selectively): Y

Next adapter: intel drm LVDSDDC_C (i2c-1)
Do you want to scan it? (YES/no/selectively): Y

Next adapter: SMBus I801 adapter at 18a0 (i2c-2)
Do you want to scan it? (YES/no/selectively): Y
Client found at address 0x50
Probing for `Analog Devices ADM1033'... No
Probing for `Analog Devices ADM1034'... No
Probing for `SPD EEPROM'... Yes
(confidence 8, not a hardware monitoring chip)
Probing for `EDID EEPROM'... No

Now follows a summary of the probes I have just done.
Just press ENTER to continue:

Driver `coretemp':
* Chip `Intel Atom thermal sensor' (confidence: 9)

To load everything that is needed, add this to /etc/modules:
#----cut here----
# Chip drivers
coretemp
#----cut here----
If you have some drivers built into your kernel, the list above will
contain too many modules. Skip the appropriate ones!

Do you want to add these lines automatically to /etc/modules? (yes/NO)Y
Successful!

Monitoring programs won't work until the needed modules are
loaded. You may want to run '/etc/init.d/module-init-tools start'
to load them.

Unloading i2c-dev... OK
Unloading i2c-i801... OK

then:

achi@achi:~$ sudo service module-init-tools start
module-init-tools stop/waiting

What does that mean? Is the module up and running now or stopped?

Anyway, next one, trying to see if there is a controlable fan with "sensors"

achi@achi:~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +56.0°C (crit = +98.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Core 0: +59.0°C (crit = +100.0°C)

Aha! some coretemp-isa should be there.. what is the virtual device by the way?
but then, still:

achi@achi:~$ sudo pwmconfig
# pwmconfig revision 5770 (2009-09-16)
This program will search your sensors for pulse width modulation (pwm)
controls, and test each one to see if it controls a fan on
your motherboard. Note that many motherboards do not have pwm
circuitry installed, even if your sensor chip supports pwm.

We will attempt to briefly stop each fan using the pwm controls.
The program will attempt to restore each fan to full speed
after testing. However, it is ** very important ** that you
physically verify that the fans have been to full speed
after the program has completed.

/usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed
achi@achi:~$

so strange.. what could that be? I dont know how to fix that

[Adorno2]

I can confirm, that until 60° Celsius the fan keeps silent. Then it starts again. By pressing the silent button I can keep it quiet for one or two minutes but it starts again. When using Windows the fan keeps being silent always though.

Samsung e-251 (R519/R719)
Linux 2.6.35-24-generic #42-Ubuntu

[Frank]

achi, did you installed laptop-mode-tools?