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Bad           Wireless Power Saving for interface wlan0

lspci -k
...
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)
    Subsystem: Intel Corporation Centrino Advanced-N 6205 AGN
    Kernel driver in use: iwlagn
...

p@blo:~$ cat /etc/laptop-mode/conf.d/wireless-iwl-power.conf 
#
# Configuration file for Laptop Mode Tools module wireless-iwl-power.
#
# For more information, consult the laptop-mode.conf(8) manual page.
#


###############################################################################
# IWL Wireless Power settings
# ---------------------------
#
# If you enable this setting, laptop mode tools will automatically set
# the powersave mode of Intel wireless adapters supported by the
# iwlagn driver (including 4965, 5100, 5300, 5350, 5150, 1000, and
# 6000).
#
#
###############################################################################

# Enable debug mode for this module
# Set to 1 if you want to debug this module
DEBUG=0

# Control Intel IWL wireless power?
# Set to 0 to disable
CONTROL_IWL_POWER=1

# Levels passed to "/sys/class/net/*/device/power_level" for the iwlwifi
# wireless chipsets. The allowed values are:
# 0 = most power usage
# ...
# 5 = least power usage
IWL_AC_POWER=5
IWL_BATT_POWER=5

p@blo:~$ ls -l /sys/class/net/wlan*/device/
razem 0
-rw-r--r-- 1 root root 4096 09-30 19:48 broken_parity_status
-r--r--r-- 1 root root 4096 09-30 19:43 class
-rw-r--r-- 1 root root  256 09-30 19:42 config
-r--r--r-- 1 root root 4096 09-30 19:48 consistent_dma_mask_bits
-r--r--r-- 1 root root 4096 09-30 19:43 device
-r--r--r-- 1 root root 4096 09-30 19:48 dma_mask_bits
lrwxrwxrwx 1 root root    0 09-30 19:42 driver -> ../../../../bus/pci/drivers/iwlagn
-rw------- 1 root root 4096 09-30 19:48 enable
drwxr-xr-x 3 root root    0 09-30 19:42 ieee80211
-r--r--r-- 1 root root 4096 09-30 19:43 irq
drwxr-xr-x 3 root root    0 09-30 19:48 leds
-r--r--r-- 1 root root 4096 09-30 19:48 local_cpulist
-r--r--r-- 1 root root 4096 09-30 19:48 local_cpus
-r--r--r-- 1 root root 4096 09-30 19:48 modalias
-rw-r--r-- 1 root root 4096 09-30 19:48 msi_bus
drwxr-xr-x 3 root root    0 09-30 19:42 net
drwxr-xr-x 2 root root    0 09-30 19:42 power
--w--w---- 1 root root 4096 09-30 19:48 remove
--w--w---- 1 root root 4096 09-30 19:48 rescan
--w------- 1 root root 4096 09-30 19:48 reset
-r--r--r-- 1 root root 4096 09-30 19:43 resource
-rw------- 1 root root 8192 09-30 19:48 resource0
lrwxrwxrwx 1 root root    0 09-30 19:43 subsystem -> ../../../../bus/pci
-r--r--r-- 1 root root 4096 09-30 19:48 subsystem_device
-r--r--r-- 1 root root 4096 09-30 19:48 subsystem_vendor
-r--r--r-- 1 root root 4096 09-30 19:48 temperature
-rw-r--r-- 1 root root 4096 09-30 19:48 tx_power
-rw-r--r-- 1 root root 4096 09-30 19:42 uevent
-r--r--r-- 1 root root 4096 09-30 19:43 vendor