[ltp] Bad fan behaviour in X61s caused by GPU temperatur sensor

Henrique de Moraes Holschuh linux-thinkpad@linux-thinkpad.org
Sat, 5 Dec 2009 13:03:46 -0200

On Sat, 05 Dec 2009, Shot (Piotr Szotkowski) wrote:
> > That made me conclude I could simply reduce that trigger temperature
> > at the wireless. (Now if the BIOS was open source ...:) )
> Did you manage to reduce the wireless temperature? I tried lowering the
> signal strength on the X60, but this doesn???t seem to affect how hot the
> right palmrest gets. :(

Use the power management of the wireless card.  You can tell it to shorten
the window it is allowed to use, and it will use less power accordingly.
Network throughput _will_ be reduced, and network latency might increase as

On a ipw2100/2200/2950, you have to use iwpriv get_power/set_power to do it.
I use modes 6 (AC, full time slots) and 7 (battery, shortest possible
slots), for example.  There are intermediate steps, but I never found a good
use for them as I am either doing heavy network use and need mode 6, or
interactive ssh sessions, for which mode 7 is quite good enough.

I believe newer cards have to use "iw" instead to set their power management
strategy, since they use the softmac layer in the kernel.

  "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