This "bug" still persists after doing a clean install of 14.04 (coming from 13.10).
When I power on, sometimes I just see the WiFi icon animation, trying to connect but not succeeding. I do several power off (or restart) cycles before my netbook's WiFi detects and connects to my home network.
But if I do a suspend, I notice my machine connects right after resume.
lspci -nn | grep 0280 output:
05:00.0 Network controller : Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
lo no wireless extensions. eth1 no wireless extensions. wlan1 IEEE 802.11abg ESSID:"Like A Virgin" Mode:Managed Frequency:2.412 GHz Access Point: 58:6D:8F:CC:DC:F2 Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off
My machine is a Samsung NF310 netbook.
thanks to @terdon for guidance.