Ralink RT3090 in Ubuntu 14.04 -- Very bad reception + keeps disconnecting

Solution 1:

I did this:

  1. Open terminal
  2. Write if you have leafpad:

    sudo leafpad /etc/modprobe.d/blacklist.conf 
    

    if you have gedit:

    sudo gedit /etc/modprobe.d/blacklist.conf
    
  3. Add these lines at the end of the file:

    blacklist rt2800usb
    blacklist rt2x00lib
    blacklist rt2x00pci
    blacklist rt2x00usb
    blacklist rt2800mmio
    blacklist rt2x00m
    
  4. Save and close the file

  5. Reboot.

Hope this helps.