It is a hardware problem. To reset acpi of the mac : * Shut down your Ubuntu * Disconnect the AC Adapter * Remove the computer's battery * Press the power button for 5 seconds * Reconnect the battery and the AC Adapter * Turn your computer on
It is a hardware problem. To reset acpi of the mac :
* Shut down your Ubuntu
* Disconnect the AC Adapter
* Remove the computer's battery
* Press the power button for 5 seconds
* Reconnect the battery and the AC Adapter
* Turn your computer on