Comment 8 for bug 1088146

Altough I'm not using Ubuntu, I'm also affected by this problem. Battery level doesn't seem to be a cause since this just happened to me and I had charged to 100% before.

I'm not sure if this is a linux problem or a firmware problem since i t will remain until battery is replugged.

Also, this time I charged to 100% using windows 8, and then shutdown the PC. Later I turned it on to boot Arch Linux and the fan went full speed (while booting the kernel), and battery led blinking orange.
I powerd off the laptop again, and the led kept blinking. Then I powered it on again and the led keeps blinking but the fan speed has returned to normal.

Replugging the power cord results in the battery led blinking between green and orange, instead of the black/orange I previously got.