Access point, some see it, some don't

john dowd jdowdster
Thu Dec 11 08:29:58 PST 2008

I have my access point setup using hostapd on a laptop using a wifi
USB dongle. The driver is the rt2x00usb driver. Hostapd comes up and
starts spewing out debug information and seems to be quite happy. I
then have a wifi enabled cell phone (It's a Neo Freerunner of all
things, really nifty) and I can run the "iwlist eth0 scan" command and
it can see the access point. In fact I have WPA2 enabled at both ends
and I can see from the hostapd debug that the access is even
negotiated successfully.

The next client is the Nokia E71 wifi enabled phone. It can see other
access points and I can connect to them but it can not see my access
point that is running on the laptop. I can see that when I first boot
the phone that it does the probes and that hostapd debug shows the MAC
address of the phone doing the following:

1229012536.048904: STA 00:18:f3:92:2c:92 sent probe request for broadcast SSID

My question is, what are the possible problems with a client not
seeing a particular access point? The client phone and the access
point are sitting side by side so I can't see it being a power level
problem. Is there some specific place in the hostapd code base I can
place some debug messages to see why the access point is not being

One thing that may be a problem is I did have to modify the
rt2x00usb.c file according to the bug that was being talked about
yesterday. I went into the file and changed the code with the patched

- __set_bit(TXDONE_UNKNOWN, &txdesc.flags);
+ __set_bit(TXDONE_SUCCESS, &txdesc.flags);

Without this, nothing works but perhaps its now interfering with the Nokia E71?

Any ideas would be very helpful.

                              John Dowd
                              jdowd at
                              133 Waverley St.
                              Ottawa Ont. K2P 0V3
                              Home: (613)234-7884
                              Cell: (613)316-7884

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