KEY_BRIGHTNESS_ZERO 1667 drivers/acpi/acpi_video.c keycode = KEY_BRIGHTNESS_ZERO; KEY_BRIGHTNESS_ZERO 1956 drivers/acpi/acpi_video.c set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); KEY_BRIGHTNESS_ZERO 54 drivers/platform/x86/fujitsu-tablet.c KEY_BRIGHTNESS_ZERO,