This is the second times it happens to me. Both times, scenario was the same:
- running ubuntu
- wireless connection were disabled
- my computer stopped brutally (no battery or hard reboot)
- when I reboot, there is no wireless connection option anymore (windows and ubuntu)
First time it happened, I had to send my computer to technical service and they changed my motherboard. But I can't believe there isn't a easier solution.
My pc is a DELL inspiron M301z with ubuntu and windows in dual boot.