I am dualbooting ubuntu 12.10 64 bit and OS X. I followed the instructions here: https://help.ubuntu.com/community/MacBookPro9-2/Quantal to get the wireless card working. Everything went fine.

I have been using the above setup for a couple of months. However sometimes the wireless card stops working. I have no clue what causes the problem, but now I am able to reproduce it:

  • When I am rebooting OSX and choosing ubuntu from the boot menu, the wireless card stop working.
  • When I am shutting down/power off OSX (completely), the wireless card works/start working again in Ubuntu.