Turns out this is a known issue in Maverick too. See https://help.ubuntu.com/community/MacBookPro6-2/Maverick#Sensors for workaround.
Module 'coretemp' needs to be modprobed, as soon as this is done I see the fans spin up (gradually over, say 2 minutes). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/742257 Title: Natty Narwhal 64-bit for Mac: macbook pro runs very hot - no fans can be heard -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs