I have a machine with Windows 7 and Ubuntu 11.10
In Ubuntu I have about 30% packet loss when I make pings either to my router gateway or to an external site such as google.com, so my internet connection goes very slow.
Since the network works perfectly fine in Windows 7 (without any packet loss), I assume it's not a problem of the line.
Is there anything I could change in network settings or something similar in order to make this work correctly in Ubuntu?
I edit to say that I found my solution here (the problem was defective realtek drivers):