Wireless network problems with DELL Vostro running Ubuntu

Problem: Can’t connect to wireless network using Ubuntu together with Dell Vostro notebook or wireless light is not burning or any other wireless connectivity problems with the Dell Vostro running Ubuntu.

Solution:

The network service needs to be restarted once all the other services are started.

Add the line to the file /etc/rc.local

/etc/init.d/networking restart 

And reboot the PC and now it should work.