IEEE_80211_DEBUG is compiled into the kernel.
When I ran "wlandebug +scan", I got the following output:
net.wlan.0.debug: 0x0 => 0x200000
Then I ran "ifconfig wlan0 up" and then "ifconfig wlan0 scan".
The scan now took a few seconds, but still nothing shows up.
Then I took a look at dmesg -a which was now filled with a loop of the
following messages:
wlan0: ieee80211_start_scan_locked: active scan, duration
2147483647
mindwell 0 maxdwell 0, desired mode auto, append, nojoin, once
wlan0: scan set 1g, 6g, 11g, 7g, 13g, 52a, 56a, 60a, 64a, 36a, 40a, 44a,
48a, 2g, 3g, 4g, 5g, 8g, 9g, 10g, 12g, 149a, 153a, 157a, 161a, 165a,
100a, 104a, 108a, 112a, 116a, 120a, 124a, 128a, 132a, 136a, 140a dwell
min 20ms max 200ms
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 140a -> 1g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 1g -> 6g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 6g -> 11g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 11g -> 7g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 7g -> 13g [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 13g -> 52a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 52a -> 56a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 56a -> 60a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 60a -> 64a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 64a -> 36a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 36a -> 40a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 40a -> 44a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 44a -> 48a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 48a -> 2g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 2g -> 3g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 3g -> 4g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 4g -> 5g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 5g -> 8g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 8g -> 9g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 9g -> 10g [active, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 10g -> 12g [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 12g -> 149a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 149a -> 153a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 153a -> 157a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 157a -> 161a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 161a -> 165a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 165a -> 100a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 100a -> 104a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 104a -> 108a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 108a -> 112a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 112a -> 116a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 116a -> 120a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 120a -> 124a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 124a -> 128a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 128a -> 132a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 132a -> 136a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=0
wlan0: scan_task: chan 136a -> 140a [passive, dwell min 20ms max 200ms]
wlan0: scan_curchan: calling; maxdwell=200
wlan0: scan_task: waiting
wlan0: scan_task: loop start; scandone=1
wlan0: scan_task: out
wlan0: sta_pick_bss: no scan candidate
wlan0: scan_task: done, [ticks
2147275107, dwell min 20 scanend 4294748797]
wlan0: notify scan done
wlan0: ieee80211_scanreq: flags 0x20052 duration 0x7fffffff mindwell 0
maxdwell 0 nssid 1
wlan0: ieee80211_check_scan: active scan, append, nojoin, once
wlan0: sta_pick_bss: no scan candidate
The system kept on printing these messages until I rebooted this machine
back to Windows (in order to write this reply).