[ltp] fan, old, Always-on problem. thinkwiki need some corrections.

[Henrique de Moraes Holschuh]

On Sun, 27 May 2007, Alexey Fisher wrote:
> If somebody steal care about this problem.
> 1.
> this post
> http://www.thinkwiki.org/wiki/Talk:Problem_with_fan_noise#Correct_BIOS_settings.3F
> 
> make the trick. Disabling speedstep in BIOS and using kernel
> speedstep_module make a workaround for my thinkpad t43.

How does the T43 act when you do this?

> 2.
> On more issue may help to fix thinkpad_acpi for always_on ( I hope ):
> switching AC to BAT and back to AC will reset fan ( or EC ) and disable
> it if sensors are cold. IMHO some watchdog-reseting of EC can be good.

Rebooting the EC is probably possible, but it is evil black magic, dealing
with the sacrifice of megabits, a lot digital alchemy to create black
corestones, and arcane rituals to unbind the buses and unleash inverted
clocks landen with RF ghost noises.

I.e. Deeply Evil Stuff man was not meant to know.  And it is model-specific
too, like all decent arcane black magic.  If you want to know the T43's,
track down the firmware source code in the web, spend some week man-hours in
reverse engineering, and please tell us how to archieve that :-)

But the plug-and-unplug AC is nice, clean, and mostly side-effect free. I
added it to thinkwiki, thanks!

> 3.
> for t43 only!
> http://thinkwiki.org/wiki/Image:T43-thermal-sensors.jpg
> The 0xC1 sensor is *not* southbridge. The sensor is max1989 located
> under the southbridge. This is "Multichannel Remote/Local Temperature
> Sensors" but used only local one.It show temperature of
> southbridg+wlan+_clock_generator_ .
> http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2313

Added the clock-generator data, will also add it to the thinkpad-acpi docs.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh