Recently purchased a Palm Pre and immediately found some issues with connecting to the Wifi Hotspot. Connecting to other access points would work flawlessly. Using the Palm Pre hotspot, I can get connected, but the connection will drop after a very short period of time. There are messages in the system log whenever the connection drops: No probe response from AP <address> after 500ms, disconnecting. An internet search turned up several results for people with the same issue, different wireless drivers and different access point types. I traced this message down to mac80211/mlme.c, to the ieee80211_sta_work() function, and was able to determine that for some reason this particular AP was not responding to probe requests. This let me further on to the function ieee80211_mgd_probe_ap_send(), which sends a direct probe request to the AP -- this probe request was being sent and never responded to. If I change this function to send a probe request to the broadcast address, in a similar manner to what is done in ieee80211_direct_probe(), then the access point responds and works without issue. Due to the volume of issues on the internet that I see with the same underlying symptoms, I wonder if there are some small amount of access points that will not respond to a direct packet probe request even when associated. I admittedly know very little about wireless networking internals, so I am hesitant to state that this fix is necessary or appropriate, but it does solve the issue for me and I am able to remain connected to the Palm Pre hotspot, as well as other access points that I have tried. Please let me know if I can provide further information in this space. Thank You, Chad -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
