I notice that if user stays on wifi setting screen, wifi layer will do
continous scan every 6 seconds, and in wpa_supplicant, if there is no wifi
link, and if there are some enabled wifi configurations (wifi network in
wpa_supplicant.conf), it will restart scan every 5 seconds.

Let us assuming there are 3 wifi networks in wpa_supplicant.conf (ssid1,
ssid2, and ssid3), then scan time line is
----|-------5s------|--1s--|-------5s------|--1s--|-------5s------|--1s--|-------5s------|--1s--|-------5s------|--1s--|
  scan1      scan2  scan3      scan4  scan5     scan6  scan7      scan8
scan9      scan10  scan11

If 14 channels are all scanned, and scan one time, at least 1s. It will
leads to the situation, scan2 has not completed, but scan3 trigger starts.

So could we disable wpa_supplicant scan if UI stays on wifi setting UI? at
only just user not stay on wifi setting, then start wpa_supplicant continous
scan?

Anyone has some ideas?

Best Regard
Walker

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