Fixed slow wifi (n mode) on Lubuntu 11.10

I followed this guide.
In particular the second method worked for me.

2- Second Method:

This method involves forcing iwlagn to not use n, the commands will disable n on the device without making it a permanant change, check first if this work for you, if you notice that the speed improved then continue to make the change permanant. If this solution didnt work for you, then reboot your computer to revert the chnages.

sudo rmmod -f iwlagnsudo modprobe iwlagn 11n_disable=1

If you notice that the wifi speed improved, then make the change permanent :

sudo vi /etc/modprobe.d/iwlagn-disable11n.conf

and add this line to the file:
options iwlagn 11n_disable=1`

save & quit