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I am running Arch Linux on a Thinkpad T420 laptop. When trying to connect to a university network, I am encountering an issue where I am able to connect to certain access points but not to others. I believe the pattern is that I can connect to 5.7ghz access points but not to 2.4ghz access points. When connecting to a 2.4ghz access point, I get a "direct probe to <BSSID> timed out" error. I am using wicd with wpa_supplicant and PEAP/GTC authentication. This is especially troublesome because I cannot choose which access point to connect to - it is a WPA2 Enterprise network, so I can just tell wicd to connect to the SSID. When the system decides to try to connect to a 2.4ghz network, it times out, while when it connects to a 5.7ghz network, it succeeds.
Could this be a software/configuration problem or is there potentially something wrong with my hardware? Is there anything I can do to force the system to connect only to certain channels (the 5.7ghz ones). I would appreciate any insight anyone has into this sort of problem. I am happy to provide more information - just not sure what is relevant.
Thanks a lot!
Last edited by ajd (2012-01-31 16:33:59)
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Solved this. For whatever reason, it seems like the routers were blocking my 2.4GHz connections (read somewhere that this could have been because they block 2.4GHz once they detect that you are capable of 5GHz, but I can't find the link), but I was able to force the system to only attempt 5GHz connections by adding the line
freq_list=5180 5200 5220 5240 5260 5280 5300 5320 5500 5520 5540 5560 5580 5660 5680 5700 5745 5765 5785 5805 5825
to my wicd encryption template in the network block. (Equivalent to adding it in wpa_supplicant.conf, I think.) So hopefully this helps anyone with similar problems in the future.
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