flofly@gongxian:~$ sudo dmesg | tail -30
[  121.592057] wlan0: authenticate with 74:ea:3a:e4:de:50 (try 2)
[  121.792055] wlan0: authenticate with 74:ea:3a:e4:de:50 (try 3)
[  121.992057] wlan0: authentication with 74:ea:3a:e4:de:50 timed out
[  130.588448] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 1/3)
[  130.788069] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 2/3)
[  130.988061] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 3/3)
[  131.188066] wlan0: direct probe to 74:ea:3a:e4:de:50 timed out
[  139.773919] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 1/3)
[  139.976054] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 2/3)
[  140.176052] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 3/3)
[  140.380052] wlan0: direct probe to 74:ea:3a:e4:de:50 timed out
[  148.984372] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 1/3)
[  149.184071] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 2/3)
[  149.384076] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 3/3)
[  149.584070] wlan0: direct probe to 74:ea:3a:e4:de:50 timed out
[  161.475433] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 1/3)
[  161.672077] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 2/3)
[  161.872083] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 3/3)
[  162.072054] wlan0: direct probe to 74:ea:3a:e4:de:50 timed out
[  170.668351] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 1/3)
[  170.868069] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 2/3)
[  171.068057] wlan0: direct probe to 74:ea:3a:e4:de:50 (try 3/3)
[  171.268065] wlan0: direct probe to 74:ea:3a:e4:de:50 timed out
[  179.853163] wlan0: authenticate with 74:ea:3a:e4:de:50 (try 1)
[  179.855780] wlan0: authenticated
[  179.860074] wlan0: associate with 74:ea:3a:e4:de:50 (try 1)
[  179.862812] wlan0: RX AssocResp from 74:ea:3a:e4:de:50 (capab=0x431 status=0 aid=5)
[  179.862818] wlan0: associated
[  179.864957] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  190.912035] wlan0: no IPv6 routers present