For those who also have a INPROCOMM IPN 2220-Adapter:

If there is already a non-functioning Windows driver via ndiswrapper was installed, it must first be removed (see my comments above).

A working driver can be installed in the following ways:

sudo apt-get install ndiswrapper-utils-1.9
mkdir ipn
ipn cd
wget http:// wifi.uevora.pt / drivers/acer/ipn2220/inprocomm_ipn2220_v3.07.02.2005.zip
inprocomm_ipn2220_v3.07.02.2005.zip unzip
sudo ndiswrapper-i neti2220.inf
sudo depmod-a
sudo modprobe ndiswrapper
sudo ndiswrapper-m
echo ndiswrapper | sudo tee-a / etc / modules

After a reboot the wireless adapter should work.