I'm not sure if it's the right place to mention that, but I have exactly the same kind of problem with :
- wifi usb dongle with *ralink* rt2500usb chipset
and
- pci wifi card with *ralink* rt28xxpci
The first one has worked for me from ubuntu 08.04 till ubuntu 12.04.02 (or .03)
The second one is part of a newer pc and has never fully worked since ubuntu 12.04.02 (or .03) neither on 13.04, 13.10 and 14.04
Problems are the same for both cards : they see networks, can connect, but wifi rates are so low than it's non usable.
I have tried to compile linux-drivers provided by ralink but I'm not skilled enough and had no success. Those drivers were designed for 2.6.x kernel you can find here http://www.mediatek.com/en/downloads/
I'm not sure if it's the right place to mention that, but I have exactly the same kind of problem with :
- wifi usb dongle with *ralink* rt2500usb chipset
and
- pci wifi card with *ralink* rt28xxpci
The first one has worked for me from ubuntu 08.04 till ubuntu 12.04.02 (or .03)
The second one is part of a newer pc and has never fully worked since ubuntu 12.04.02 (or .03) neither on 13.04, 13.10 and 14.04
Problems are the same for both cards : they see networks, can connect, but wifi rates are so low than it's non usable.
I have tried to compile linux-drivers provided by ralink but I'm not skilled enough and had no success. Those drivers were designed for 2.6.x kernel you can find here http:// www.mediatek. com/en/ downloads/
Also tried with ndiswrapper, not better.