Comment 8 for bug 52852

I also noticed my MacBook (Black) getting very hot (much hotter than in OS X). I recently applied a firmware update which claimed to improve fan behavior, but so far I didn't notice any difference.

The directories /proc/acpi/fan/ and /proc/acpi/thermal_zone/ are both empty - so Ubuntu's power management hasn't discovered the fan and cooling systems!

I'm not sure if the MacBook firmware itself can and will prevent serious overheating. If it doesn't, couldn't that cause permanent damage to the device? In that case, this bug should be addressed with higher priority, it certainly is of highest priority to MacBook users who care for the safety of their pricy MacBooks!

(About the "sleep not working" comments: Can't comment, but if it doesn't work, please file another bug since it's not directly related to the overheating issue.)