Dell Laptop : Ubuntu 10.x Wireless Disabled : Quick Fix

I face this quite often in my ubuntu 10.x on Dell laptop, though I am not really sure why it happens. After troubleshooting so many steps, I figured out a quick fix.

First verify whether your connection is hard blocked or soft blocked.


$ rfkill list
0: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: dell-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: yes
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

Soft blocks, you can enable the wireless through right-click on top panel task bar.

If its hard blocked as its shown above , following command did trick for me 

$ sudo rmmod -f dell-laptop

Anyone knows why it happens?