No Wifi Connection on DB410c linaro ubuntu


I followed the instructions in:

And I succeed in installing the OS from SD.
But I found db410c cannot connect to Wifi. The progress will stop at "Requesting a Wi-Fi network address for …”.

I got the following from dmesg | grep wlan0
[ 528.369203] wlan0: associated

And I got the following from dmesg
[ 509.291500] wcn36xx:ERROR hal_remove_bsskey response failed err=16
[ 569.270276] wcn36xx: ERROR SMD_EVENT(259) not supported

What should I do?