The
backlight
utility can be used to configure brightness levels for registered backlights.
Called without any arguments it will print the current brightness level
of the first registered backlight.
The options are as follows:
-f device
|
|
Device to operate on.
If not specified,
/dev/backlight/backlight0
is used.
If an unqualified name is provided,
/dev/backlight/
is automatically prepended.
|
-i
|
Query information about the backlight (name, type).
|
-q
|
When querying the brightness level only print the value.
|
value
|
Set the brightness level to this value, must be between 0 and 100.
A trailing
"%"
is valid.
|
incr| + [value]
|
|
Decrement the backlight level.
If no value is specified a default of 10 percent is used.
|
decr| - [value]
|
|
Increment the backlight level.
If no value is specified a default of 10 percent is used.
|