Might be useful for those Linux Mint 13 users that bought an Ultrabook (Asus, Toshiba, Dell, etc)
These ultrabooks ( most of them ) will come with this ATH9K + bluetooth wifi netcard.
Under Linux Mint 13 (Mate at least !) your wifi card will connect to your wireless router but the speed will be outrageous low ( 52K ...maybe!)
All you have to do is the following:
1. sudo su -
2. create a file name ath9k.conf under /etc/modprobe.d (touch /etc/modprobe.d/ath9k.conf - for example )
3. nano /etc/modprobe.d/ath9k.conf and introduce one line containing the following:
options ath9k nohwcrypt=1
4.Save the file
5.Issue the following commands to remove then reload the modules properly without rebooting your system:
modprobe -b ath9k
Now you should have the proper Internet speed .
As for the bluetooth ( if you have a bluetooth headset you'd like to use with your Ultrabook ) you will need to use Synaptics and install Bluez manager with some more extra libraries in order to be able to connect your bluetooth headset to your Ultrabook