Looking through all the power manager settings it seems they have removed the brightness_battery and brightness_ac settings that used to achieve this. Hopefully it will be back in 12.04
Until then a possible solution is to write a script that sets the back-light brightness on ac -> battery and back.
This is a rather annoying issue.
Looking through all the power manager settings it seems they have removed the brightness_battery and brightness_ac settings that used to achieve this. Hopefully it will be back in 12.04
Until then a possible solution is to write a script that sets the back-light brightness on ac -> battery and back.