<div dir="ltr"><div>Hi,</div>
<div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">>SALT# hostapd -d /etc/hostapd/hostapd.conf | grep ACS</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Automatic channel selection started, this may take a bit</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Scanning 1 / 5</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>wlan1: interface state COUNTRY_UPDATE->ACS</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>wlan1: ACS-STARTED</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>Interface initialization will be completed in a callback (ACS)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Using survey based algorithm (acs_num_scans=5)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Scanning 2 / 5</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Using survey based algorithm (acs_num_scans=5)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Scanning 3 / 5</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Using survey based algorithm (acs_num_scans=5)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Scanning 4 / 5</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Using survey based algorithm (acs_num_scans=5)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Scanning 5 / 5</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Using survey based algorithm (acs_num_scans=5)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Trying survey-based ACS</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: Survey analysis for channel 13 (2472 MHz)</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: 1: min_nf=-98 interference_factor=0.00909091 nf=-98 time=110 busy=1</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>rx=0</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: 2: min_nf=-98 interference_factor=0.00900901 nf=-98 time=111 busy=1</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>rx=1</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: 3: min_nf=-98 interference_factor=0.0540541 nf=-98 time=111 busy=6 rx=3</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: 4: min_nf=-98 interference_factor=2.51189e-</span><span style="font-size:12.8000001907349px">20 nf=-98 time=111</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>busy=0 rx=0</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>ACS: 5: min_nf=-98 interference_factor=2.51189e-</span><span style="font-size:12.8000001907349px">20 nf=-98 time=111</span><br style="font-size:12.8000001907349px"><span style="font-size:12.8000001907349px">>busy=0 rx=0</span><br></div><div><br></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">This log indicates that other channels(ch.1-12) would be disabled for some reason.</span></div><div><span style="font-size:12.8000001907349px">Normally, log shows all channel's survey result, but it seems only one channel.</span></div><div><span style="font-size:12.8000001907349px">Another example <a href="http://6.ch">6.ch</a> case would be same similarly.</span></div><div><span style="font-size:12.8000001907349px">Inference is ath5k driver doesn't send all channel's valid survey date when it set defined channel previously, as you said.</span></div><div><span style="font-size:12.8000001907349px">Can you check the log about 'nl80211', you can see it as following.</span></div><div><pre style="color:rgb(0,0,0)">$ hostapd -d hostapd.conf | grep nl80211</pre></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">Sample(</span><span style="font-size:12.8000001907349px">partial log</span><span style="font-size:12.8000001907349px">)</span></div><div><span style="font-size:12.8000001907349px">===</span></div><div><div><span style="font-size:12.8000001907349px">nl80211: Scan included frequencies: 2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462</span></div><div><span style="font-size:12.8000001907349px">nl80211: Fetch survey data</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2412 MHz noise=-91 channel_time=167 busy_time=0 tx_time=0 rx_time=126 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2417 MHz noise=-91 channel_time=167 busy_time=0 tx_time=0 rx_time=123 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2422 MHz noise=-91 channel_time=167 busy_time=0 tx_time=0 rx_time=116 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2427 MHz noise=-92 channel_time=167 busy_time=0 tx_time=0 rx_time=85 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2432 MHz noise=-91 channel_time=167 busy_time=0 tx_time=0 rx_time=23 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2437 MHz noise=-92 channel_time=167 busy_time=0 tx_time=0 rx_time=16 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2442 MHz noise=-92 channel_time=167 busy_time=0 tx_time=0 rx_time=17 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2447 MHz noise=-92 channel_time=167 busy_time=0 tx_time=0 rx_time=24 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2452 MHz noise=-92 channel_time=167 busy_time=0 tx_time=0 rx_time=41 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2457 MHz noise=-93 channel_time=167 busy_time=0 tx_time=0 rx_time=41 filled=000b)</span></div><div><span style="font-size:12.8000001907349px">nl80211: Freq survey dump event (freq=2462 MHz noise=-92 channel_time=167 busy_time=0 tx_time=0 rx_time=44 filled=000b)</span></div></div><div><span style="font-size:12.8000001907349px">===</span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">Yobi</span></div></div>