[G 2014 Android Development] slaphappy76:
I had the same problems. Here a log error list.

03-10 19:13:25.224 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,00 rxSuccessRate=0,50 targetRoamBSSID=any RSSI=-48

03-10 19:13:25.224 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=102943 interval=101250 maxinterval=300000

03-10 19:13:25.224 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN try full band scan age=102943 interval=101250 maxinterval=300000

03-10 19:13:25.224 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=true

03-10 19:13:25.224 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN bump interval =151875

03-10 19:13:25.225 E/WifiStateMachine(1059): [1.426.011.205.225 ms] noteScanstart no scan source

03-10 19:13:25.243 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source 10014 txSuccessRate=0,00 rxSuccessRate=0,50 targetRoamBSSID=any RSSI=-48

03-10 19:13:25.759 E/WifiStateMachine(1059): [1.426.011.205.759 ms] noteScanEnd no scan source

03-10 19:13:25.765 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:13:42.353 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=56,50 rxSuccessRate=65,26 targetRoamBSSID=any RSSI=-48

03-10 19:13:42.353 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=17129 interval=151875 maxinterval=300000

03-10 19:13:42.353 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN prevent full band scan due to pkt rate

03-10 19:13:42.353 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 ...and ignore scans tx=56,50 rx=65,26

03-10 19:13:51.141 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=14,19 rxSuccessRate=14,41 targetRoamBSSID=any RSSI=-48

03-10 19:13:51.141 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=25917 interval=151875 maxinterval=300000

03-10 19:13:51.141 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN prevent full band scan due to pkt rate

03-10 19:13:51.141 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:13:51.142 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:13:51.146 E/WifiStateMachine(1059): [1.426.011.231.146 ms] noteScanstart no scan source

03-10 19:13:51.216 E/WifiStateMachine(1059): [1.426.011.231.216 ms] noteScanEnd no scan source

03-10 19:13:51.219 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:14:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=65,99 rxSuccessRate=61,62 targetRoamBSSID=any RSSI=-47

03-10 19:14:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=45922 interval=151875 maxinterval=300000

03-10 19:14:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN prevent full band scan due to pkt rate

03-10 19:14:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 ...and ignore scans tx=65,99 rx=61,62

03-10 19:14:31.372 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source 10014 txSuccessRate=9,45 rxSuccessRate=8,75 targetRoamBSSID=any RSSI=-46

03-10 19:14:31.376 E/WifiStateMachine(1059): [1.426.011.271.376 ms] noteScanStartWorkSource{10014} uid 10014

03-10 19:14:31.431 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=9,45 rxSuccessRate=8,75 targetRoamBSSID=any RSSI=-46

03-10 19:14:31.431 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=66207 interval=151875 maxinterval=300000

03-10 19:14:31.431 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN prevent full band scan due to pkt rate

03-10 19:14:31.431 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:14:31.432 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:14:31.925 E/WifiStateMachine(1059): [1.426.011.271.925 ms] noteScanEnd WorkSource{10014}

03-10 19:14:31.927 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:14:51.147 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,67 rxSuccessRate=0,67 targetRoamBSSID=any RSSI=-49

03-10 19:14:51.147 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=85923 interval=151875 maxinterval=300000

03-10 19:14:51.147 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:14:51.147 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:14:51.160 E/WifiStateMachine(1059): [1.426.011.291.160 ms] noteScanstart no scan source

03-10 19:14:51.230 E/WifiStateMachine(1059): [1.426.011.291.229 ms] noteScanEnd no scan source

03-10 19:14:51.234 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:15:11.145 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,98 rxSuccessRate=0,95 targetRoamBSSID=any RSSI=-46

03-10 19:15:11.145 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=105921 interval=151875 maxinterval=300000

03-10 19:15:11.145 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:15:11.145 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:15:11.156 E/WifiStateMachine(1059): [1.426.011.311.156 ms] noteScanstart no scan source

03-10 19:15:11.221 E/WifiStateMachine(1059): [1.426.011.311.220 ms] noteScanEnd no scan source

03-10 19:15:11.225 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:15:32.388 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=20,12 rxSuccessRate=23,75 targetRoamBSSID=any RSSI=-46

03-10 19:15:32.388 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=127164 interval=151875 maxinterval=300000

03-10 19:15:32.388 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN prevent full band scan due to pkt rate

03-10 19:15:32.388 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:15:32.388 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:15:32.390 E/WifiStateMachine(1059): [1.426.011.332.390 ms] noteScanstart no scan source

03-10 19:15:32.445 E/WifiStateMachine(1059): [1.426.011.332.445 ms] noteScanEnd no scan source

03-10 19:15:32.458 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:15:32.488 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source 10014 txSuccessRate=20,12 rxSuccessRate=23,75 targetRoamBSSID=any RSSI=-46

03-10 19:15:32.489 E/WifiStateMachine(1059): [1.426.011.332.489 ms] noteScanStartWorkSource{10014} uid 10014

03-10 19:15:33.077 E/WifiStateMachine(1059): [1.426.011.333.077 ms] noteScanEnd WorkSource{10014}

03-10 19:15:33.079 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:15:51.160 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=2,47 rxSuccessRate=2,78 targetRoamBSSID=any RSSI=-46

03-10 19:15:51.160 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=145936 interval=151875 maxinterval=300000

03-10 19:15:51.160 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:15:51.160 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:15:51.163 E/WifiStateMachine(1059): [1.426.011.351.163 ms] noteScanstart no scan source

03-10 19:15:51.246 E/WifiStateMachine(1059): [1.426.011.351.246 ms] noteScanEnd no scan source

03-10 19:15:51.261 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:16:11.151 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,08 rxSuccessRate=0,08 targetRoamBSSID=any RSSI=-44

03-10 19:16:11.151 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=165927 interval=151875 maxinterval=300000

03-10 19:16:11.152 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN try full band scan age=165927 interval=151875 maxinterval=300000

03-10 19:16:11.152 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=true

03-10 19:16:11.152 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN bump interval =227812

03-10 19:16:11.157 E/WifiStateMachine(1059): [1.426.011.371.157 ms] noteScanstart no scan source

03-10 19:16:11.717 E/WifiStateMachine(1059): [1.426.011.371.717 ms] noteScanEnd no scan source

03-10 19:16:11.721 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:16:32.594 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,00 rxSuccessRate=0,00 targetRoamBSSID=any RSSI=-45

03-10 19:16:32.594 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=21443 interval=227812 maxinterval=300000

03-10 19:16:32.594 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:16:32.594 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:16:32.601 E/WifiStateMachine(1059): [1.426.011.392.601 ms] noteScanstart no scan source

03-10 19:16:32.668 E/WifiStateMachine(1059): [1.426.011.392.668 ms] noteScanEnd no scan source

03-10 19:16:32.671 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:16:32.861 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source 10014 txSuccessRate=0,00 rxSuccessRate=0,00 targetRoamBSSID=any RSSI=-45

03-10 19:16:32.862 E/WifiStateMachine(1059): [1.426.011.392.862 ms] noteScanStartWorkSource{10014} uid 10014

03-10 19:16:33.375 E/WifiStateMachine(1059): [1.426.011.393.374 ms] noteScanEnd WorkSource{10014}

03-10 19:16:33.380 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:16:51.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,00 rxSuccessRate=0,00 targetRoamBSSID=any RSSI=-47

03-10 19:16:51.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=39995 interval=227812 maxinterval=300000

03-10 19:16:51.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:16:51.147 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:16:51.157 E/WifiStateMachine(1059): [1.426.011.411.157 ms] noteScanstart no scan source

03-10 19:16:51.228 E/WifiStateMachine(1059): [1.426.011.411.228 ms] noteScanEnd no scan source

03-10 19:16:51.232 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:17:11.147 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,06 rxSuccessRate=0,06 targetRoamBSSID=any RSSI=-46

03-10 19:17:11.147 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=59996 interval=227812 maxinterval=300000

03-10 19:17:11.147 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:17:11.147 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:17:11.157 E/WifiStateMachine(1059): [1.426.011.431.157 ms] noteScanstart no scan source

03-10 19:17:11.227 E/WifiStateMachine(1059): [1.426.011.431.227 ms] noteScanEnd no scan source

03-10 19:17:11.231 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:17:32.867 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,01 rxSuccessRate=0,02 targetRoamBSSID=any RSSI=-46

03-10 19:17:32.867 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=81716 interval=227812 maxinterval=300000

03-10 19:17:32.867 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:17:32.867 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:17:32.868 E/WifiStateMachine(1059): [1.426.011.452.868 ms] noteScanstart no scan source

03-10 19:17:32.893 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source 10014 txSuccessRate=0,01 rxSuccessRate=0,02 targetRoamBSSID=any RSSI=-46

03-10 19:17:32.935 E/WifiStateMachine(1059): [1.426.011.452.935 ms] noteScanEnd no scan source

03-10 19:17:32.937 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:17:32.942 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source 10014 txSuccessRate=0,01 rxSuccessRate=0,02 targetRoamBSSID=any RSSI=-46

03-10 19:17:32.943 E/WifiStateMachine(1059): [1.426.011.452.943 ms] noteScanStartWorkSource{10014} uid 10014

03-10 19:17:33.499 E/WifiStateMachine(1059): [1.426.011.453.499 ms] noteScanEnd WorkSource{10014}

03-10 19:17:33.503 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:17:51.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,94 rxSuccessRate=0,95 targetRoamBSSID=any RSSI=-44

03-10 19:17:51.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=99995 interval=227812 maxinterval=300000

03-10 19:17:51.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:17:51.146 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:17:51.159 E/WifiStateMachine(1059): [1.426.011.471.158 ms] noteScanstart no scan source

03-10 19:17:51.227 E/WifiStateMachine(1059): [1.426.011.471.227 ms] noteScanEnd no scan source

03-10 19:17:51.231 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false

03-10 19:18:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN source -2 txSuccessRate=0,02 rxSuccessRate=0,02 targetRoamBSSID=any RSSI=-44

03-10 19:18:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN with age=119995 interval=227812 maxinterval=300000

03-10 19:18:11.146 E/WifiStateMachine(1059): WifiStateMachine CMD_START_SCAN full=false

03-10 19:18:11.147 E/WifiStateMachine(1059): WifiStateMachine starting scan for "KNOPP-BOX-7490-REPEATER"WPA_PSK with 2412

03-10 19:18:11.157 E/WifiStateMachine(1059): [1.426.011.491.157 ms] noteScanstart no scan source

03-10 19:18:11.227 E/WifiStateMachine(1059): [1.426.011.491.227 ms] noteScanEnd no scan source

03-10 19:18:11.231 E/WifiStateMachine(1059): wifi setScanResults statecom.android.server.wifi.WifiStateMachine$ConnectedState@328c2939 sup_state=COMPLETED debouncing=false