Are the Ralink RT3090 drivers incompatible with Ubuntu 10.10?
From the bug report post #103 work fine on a MSI U210:
Go to your terminal and type in this command: lsmod | grep rt
Your output will look something similar to this one:
rt2860sta 488820 0
rt2800usb 37372 0 [...]
open your Terminal and first type in this:
sudo modprobe rf rt2800pci
sudo modprobe -rf rt2860sta
sudo modprobe rt2860sta
Just as you type in this, your networkmanager connects automatically and works! But to close the whole thing up, you need to type in this command:
echo blacklist rt2800pci | sudo tee -a /etc/modprobe.d/blacklist.conf
Then you are done and your networkmanager will work for you again.
I also have Ralink RT3090 wifi on my laptop. I'm using Kubuntu 10.10 64-bit. I installed driver from source, after installation (K)ubuntu loads 2800pci version instead of 3090sta. You have to fix it by manually editing some files.
Open /etc/modprobe.d/blacklist.conf
(as root) and add at the end:
blacklist rt2800pci.
Also open (as root) file /etc/modules
and add:
rt3390sta
I followed this post and it is working now.