[ubuntu] wifi drops connection

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http://ubuntuforums.org – Hi guys, I've got a wifi connection that drops around every half hour. When I go to the log I see this: ubuntu wpa_supplicant[29144]: CTRL-EVENT-DISCONNECTED bssid=00:23:69:28:21:75 reason=7 It then connects again, but after a while it drops. My wifi card is an AR9285 Wireless Network Adapter. I only have this when I download or copy large files. It is an b/g/n based card, though my router is g. Could this be the problem? Thx in advance (Hardware)