can't connect to wifi "device not ready"

[minesheep]

Sometimes after suspending my LL 3.8 32bit laptop wifi get's grayed out to on state. I can't connect to wifi because there is no wifi networks. After turning wifi off and on by a hardware switch it says "device not ready" I have tried to

1. Suspend again
   
2. Hibernate
   
3. turn wifi off and on with software
   

Rebooting fixes it, but can I force it to reload. This seems to be a software problem because it will not get fixed by hibernating.