This bug affects my laptop with Centrino Ultimate-N 6300 as well.
I think I have tried all the workarounds in this thread but the only thing that helped was turning on the swcrypto parameter. My /etc/modprobe.d/iwlwifi.conf now looks like this:
options iwlwifi 11n_disable=1 led_mode=1 swcrypto=1
And I can use wifi without problems. However, the fact that n-networks can not be used remains annoying.
This bug affects my laptop with Centrino Ultimate-N 6300 as well.
I think I have tried all the workarounds in this thread but the only thing that helped was turning on the swcrypto parameter. My /etc/modprobe. d/iwlwifi. conf now looks like this:
options iwlwifi 11n_disable=1 led_mode=1 swcrypto=1
And I can use wifi without problems. However, the fact that n-networks can not be used remains annoying.