Description of problem:

During normal operation in GNU/Linux (several distributions) the right-hand 
wrist rest of my Lenovo ThinkPad X60s gets unacceptably hot. The overheating 
component would seem to be the WLAN adapter (Intel PRO/Wireless 3945).

With the ipw3945 driver in another distro I was able to bring the temperature 
down using "iwpriv wlan0 set_power 7". Several sources, lesswatts.org among 
them, state that the equivalent command for iwl3945 is "echo 5 
> /sys/bus/pci/drivers/iwl3945/*/power_level". This, however, does not work:

A) Assume you've already connected to a WLAN (associated with an access point 
etc.). Entering the above command instantly kills the connection, returns an 
I/O error to the process trying to write to power_level, writes the following 
lines to syslog and fails to put the WLAN adapter in power save mode:

iwl3945: Microcode SW error detected.  Restarting 0x82000008.
iwl3945: Error Reply type 0x00000000 cmd POWER_TABLE_CMD (0x77) seq 0x0440 ser 
0x00000000
iwl3945: Can't stop Rx DMA.


B) Assume you haven't yet connected to a WLAN. Entering the above command 
succeeds and actually brings the temperature down, but with the little 
downside that the WLAN adapter stops working until reboot. This time the error 
in syslog looks like this:

iwl3945: Microcode SW error detected.  Restarting 0x82000008.
iwl3945: Error Reply type 0x00000000 cmd REPLY_QOS_PARAM (0x13) seq 0x04AA ser 
0x00000000
iwl3945: Can't stop Rx DMA.


Version-Release number of selected component (if applicable):

iwl3945-firmware.noarch                  2.14.1.5-1             installed

Steps to Reproduce:

1. Buy an X60s
2. Install Fedora 7 on it

A3. Connect to a WLAN using Network Manager
A4. Notice the right-hand wrist rest getting HOT and burn your wrist
A5. echo 5 > /sys/bus/pci/drivers/iwl3945/00*/power_level

B3. echo 5 > /sys/bus/pci/drivers/iwl3945/00*/power_level
B4. Try to connect using Network Manager

Actual results:

A) WLAN immediately killed ("No route to host"). Reconnecting with Network 
Damager succeeds, but the power save mode is not activated.

B) Power save mode entered, but all further connection attempts fail without 
an error message.

Expected results:

The WLAN adapter cools down significantly but keeps functioning normally, 
perhaps with a small range and/or throughput hit.