[ltp] fancontrol script causes hundreds of wakeups per second

[Henrique de Moraes Holschuh]

On Tue, 01 Jul 2008, green wrote:
> > annoying pulses in the fan unless you fixed the firmware of your thinkpad),
> 
> seconds, I get the fan pulsing behavior.  So: what do you mean by "fixed the 
> firmware"?  Is that sarcasm?

No, not sarcasm.  The T40-T42 and T43 had major problems in their fan
control firmware, that made the fan *really* annoying.  IBM changed the
firmware at some point, to correct that.

So, the worst of the fan behaviour was fixed for T40-T42/p, and for the
Intel-video T43.  But someone in IBM botched up the fix for the ATI-based
T43 and T43p, and THAT botched up fix made what should have been a small
pulse that changed RPMs just enough to recalibrate the tachometer, into a
major, very noisy fan pulse every 30s in a LOT of T43s.

So, a few T43 owners hacked their EC firmwares to "fix the fix".  It makes a
T43 act just like a T42.  But since the T43 fan IS louder than the T42 fan,
it will still be louder than a T42.

-- 
  "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