Don't do up scan.

Just do

ifconfig wlan0 up

ifconfig wlan0 list scan

There may be some stupid race conditions there.



-a


On 30 December 2013 10:36, Toomas Aas <toomas....@raad.tartu.ee> wrote:
> Hello!
>
> I posted a request on the FreeBSD forums on this topic, but got no
> responses:
> http://forums.freebsd.org/viewtopic.php?f=46&t=43895
>
> So, I'll repeat it here hoping that it may catch the attention of some
> experts who are maybe not following the forums.
>
> I'm trying to get TP-Link TL-WN727N V3 USB wifi adapter working with my
> FreeBSD 9.2-STABLE amd64 system (r259472). It seems to me that this adapter
> uses Ralink RT5370 chipset, and support for this was merged to 9-STABLE in
> r259457.
>
> I plug in the adapter and it seems to be recognized:
>
> Dec 18 18:13:15 kernel: ugen2.2: <TPlink> at usbus2
> Dec 18 18:13:15 kernel: run0: <1.0> on usbus2
> Dec 18 18:13:15 kernel: run0: MAC/BBP RT5390 (rev 0x0502), RF RT5370 (MIMO
> 1T1R), address f8:1a:67:19:40:24
>
> I create the wlan device:
>
> # ifconfig wlan0 create wlandev run0
>
> Then I try to scan, but both of the below commands return immediately
> without any result:
>
> # ifconfig wlan0 up scan
> # ifconfig wlan0 list scan
>
> I tried running wlandebug -i wlan0 +scan, and an endless supply of following
> is recorded in /var/log/messages:
>
> Dec 18 21:47:26 kernel: wlan0: ieee80211_check_scan: active scan, append
> Dec 18 21:47:26 kernel: wlan0: ieee80211_scanreq: flags 0x1b duration
> 0x7fffffff mindwell 0 maxdwell 0 nssid 0
> Dec 18 21:47:26 kernel: wlan0: scan_update_locked: current scanner is
> <none:none>, switch to <wlan0:STA>
> Dec 18 21:47:26 kernel: wlan0: start_scan_locked: active scan, duration
> 2147483647 mindwell 0 maxdwell 0, desired mode auto, flush
> Dec 18 21:47:26 kernel: wlan0: scan set 1g, 6g, 11g, 7g, 2g, 3g, 4g, 5g, 8g,
> 9g, 10g dwell min 20ms max 200ms
> Dec 18 21:47:26 kernel: wlan0: start_scan_locked: active scan already in
> progress
> Dec 18 21:47:26 kernel: wlan0: scan_task: chan   1b ->   1g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:26 kernel: wlan0: scan_task: chan   1g ->   6g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:27 kernel: wlan0: scan_task: chan   6g ->  11g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:27 kernel: wlan0: scan_task: chan  11g ->   7g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:27 kernel: wlan0: scan_task: chan   7g ->   2g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:27 kernel: wlan0: scan_task: chan   2g ->   3g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:27 kernel: wlan0: scan_task: chan   3g ->   4g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:28 kernel: wlan0: scan_task: chan   4g ->   5g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:28 kernel: wlan0: scan_task: chan   5g ->   8g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:28 kernel: wlan0: scan_task: chan   8g ->   9g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:28 kernel: wlan0: scan_task: chan   9g ->  10g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:29 kernel: wlan0: sta_pick_bss: no scan candidate
> Dec 18 21:47:29 kernel: wlan0: scan_task: done, restart [ticks 1706420,
> dwell min 20 scanend 2149187524]
> Dec 18 21:47:29 kernel: wlan0: scan_task: chan  10g ->   1g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:29 kernel: wlan0: scan_task: chan   1g ->   6g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:29 kernel: wlan0: scan_task: chan   6g ->  11g [active, dwell
> min 20ms max 200ms]
> Dec 18 21:47:29 kernel: wlan0: scan_task: chan  11g ->   7g [active, dwell
> min 20ms max 200ms]
>
> I've watched this output for 10 minutes and it just seems to go on
> indefinitely. I'm not sure what to think of this. There are several access
> points near me that the scan should find, but it doesn't. When I plug in the
> same adapter to a laptop with Windows 7, it successfully shows the nearby
> access points and allows me to connect to one, so the adapter is not broken.
> Any ideas for further troubleshooting are welcome.
>
> --
> Toomas Aas
>
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