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Keyboard backlight can be always off, use some automatic trigger (activity and light sensor), always on. The behaviour of the driver changes whereby previously when passed 1 it tried to turn on backlight immediately now it does nothing. This is however a bug fix since (a) it makes little sense to turn on the backlight when control is automatic and (b) this behaviour is consistent with what the windows driver does. Signed-off-by: Javier Achirica <jachirica@gmail.com> Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>