Lines Matching refs:backlight

11 The ACPI video driver does 3 things regarding backlight control:
13 1 Export a sysfs interface for user space to control backlight level
16 command line is not present, the driver will register a backlight device
17 and set the required backlight operation structure for it for the sysfs
19 directory named acpi_videoX under /sys/class/backlight.
21 The backlight sysfs interface has a standard definition here:
22 Documentation/ABI/stable/sysfs-class-backlight.
33 Note that ACPI video backlight driver will always use index for
94 Once user space tool receives this event, it can modify the backlight
97 3 Change backlight level in the kernel
100 received a notification, it will set the backlight level accordingly. This does
102 space regardless of whether or not the video module controls the backlight level
106 control of the backlight level.