--- Please enter the report below this line. ---

iwl3945 has an long standing driver/hardware bug which made
powermanagement unstable, the kernel developers so disabled the power
management some versions ago.
laptop-mode-tools try to set the power level which results in an error.

a change to the file:
/usr/share/laptop-mode-tools/modules/wireless-iwl-power

should resolve the issue.

Debian Release: wheezy/sid
500 testing ftp.de.debian.org
500 stable www.debian-multimedia.org
500 stable security.debian.org
500 stable ftp.de.debian.org
500 stable dl.google.com
500 squeeze-backports mozilla.debian.net
100 squeeze-backports backports.debian.org
--- Package information. ---
Depends (Version) | Installed
==========================-+-============
lsb-base (>= 3.0-10) | 3.2-27
util-linux (>= 2.13) | 2.17.2-9.1
psmisc | 22.13-1


Recommends (Version) | Installed
=============================-+-===========
acpid | 1:2.0.10-1
OR apmd | 3.2.2-14
OR pbbuttonsd |
OR pmud |
hdparm | 9.32-1
sdparm | 1.06-3
hal | 0.5.14-6
ethtool | 1:2.6.39-1
net-tools | 1.60-24.1
wireless-tools | 30~pre9-5
udev | 171-3


Package's Suggests field is empty.

Yes, I remember this issue. IIRC the issue is only with some card
models. In case the interface is disabled for your card, you can simply
disable the module.