I have the same problem... When I connect the AC power source in the laptop and boot it, keyboard don't works! So I reboot it and everything works fine!
Step by step to reproduce this are in the bug #366527
My solution is add to kernel the option: irqpoll
I see when the keyboard doesn´t work, my webcam not work too... I see that is related with lose of irq's.
I have the same problem... When I connect the AC power source in the laptop and boot it, keyboard don't works! So I reboot it and everything works fine!
Step by step to reproduce this are in the bug #366527
My solution is add to kernel the option: irqpoll
I see when the keyboard doesn´t work, my webcam not work too... I see that is related with lose of irq's.