Hi all, I'm running simple experiments using D-link DWA-652 card (AR5416) and kernel 2.6.27. Simply I generate UDP packets and transmit to 11n AP and, in the meanwhile another machine capture the packets in the air using tcpdump. Looking up the captured trace file, I found out that there are so many retransmitted packets, even if the link quality is very good. Repeating the same experiments using other device(Ralink RT2860 chip based PCI card from SparkLan), I don't see any retransmission. Have any idea how this happened? I think it's more likely ath9k driver problem, because ralink driver doesn't have this issue. any help would be appreciated. Thanks,
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