Thanks Austin. Finally tried it after few years(?) of planning to do it. Works fine so far. First glitch is that N810 keyboard light stays in the state when mce was stopped (either on or off). I need to change /sys/class/leds/keyboard/brightness by hand. This is actually good thing that mce manages it and we can change it when powerlaunch is running because when screen backlight is on minimum (with advanced applet), keyboard light is too bright for me at night.