Da solução mencionada pelo pôster original:
Finally got workable status using a Marvell driver from a German site!
http://forum.ubuntuusers.de/topic/verbindungsprobleme-mit-wlan-marvel-8339-libe/#post-1888522
Then from there all I did was:
sudo ndiswrapper -r wg311v3
sudo ndiswrapper -i (the Marvell.inf)
sudo modprobe ndiswrapper
Et voila!