I have old wireless pcmcia b cards that suffer from the same issue. Yes it is time to get a new network card.
The problem with these older cards is that they were built before wpa was even around.
So mechanically they are incapable of wpa.
wpa_supplicant cannot fix a hardware limitation.
Edit: Without some terminal readouts showing the wireless card chipset and manufacturer make and model. This is all just a best guess on my part from personal experience. With the information given in this thread.
Last edited by rokytnji; 04-18-2015 at 08:37 AM.
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