Intel Centrino 6300N on blackPanther OS

#Detect
lspci -v | grep -iE -5 'wifi'

# results
04:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 3e)
Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN
Flags: bus master, fast devsel, latency 0, IRQ 36
Memory at f6200000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi

# solutions for test
modprobe -r iwlwifi
modprobe iwlwifi 11n_disable=8

# pernament solutions if test is successful
echo "options iwlwifi 11n_disable=8" > /etc/modprobe.d/intel-6300-iwlwifi-disable11n.conf

# optional 1 - for powersave
echo "wifi.powersave = 2" > /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

# Optional 2 - I recommend that your regulatory domain be set explicitly. Check yours:
iw reg get

#If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:
iw reg set DE

#Of course, substitute your country code if not Germany. Set it permanently. change the last line to read:
echo "REGDOMAIN=DE" > /etc/default/crda