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NAME
adjbacklight - Convenient method for adjusting the backlight on your portable computer
SYNOPSIS
adjbacklight [-g | -s [+|-]level[%|%%]] [-a | device ...]
DESCRIPTION
adjbacklight can be used to fetch or set the backlight
non-interactively. If these feature is not used, it starts
a interactive user interface in the terminal. However, if
stdin is not a terminal, every line from stdin is parsed
as a -s argument.
adjbacklight installs with the set-uid bit set, to enable any user
to change the backlight on the computer.
adjbacklight was originally designed for small netbooks that
are not running X. However, it is still suitable for desktop
computers and can be used inside X. In fact it seems to work
for all machines with backlight, which is not true for
xbacklight(1). adjbacklight uses /sys/class/backlight.
adjbacklight as been retrofitted to be convenient for use
inside X on desktop computers, with commands that lets it
be used non-interactively with hotkeys set up in xbindkeys(1).
OPTIONS
-a Run for all devices, including ACPI devices.
-g Get average brightness on devices.
-s LEVEL Set brightness on devices by actual value.
-s +LEVEL Increase brightness on devices by actual value.
-s -LEVEL Decrease brightness on devices by actual value.
-s LEVEL% Set brightness on devices by percentage-points.
-s +LEVEL% Increase brightness on devices by percentage-points.
-s -LEVEL% Decrease brightness on devices by percentage-points.
-s LEVEL%% Set brightness on devices by percentage.
-s +LEVEL%% Increase brightness on devices by percentage.
-s -LEVEL%% Decrease brightness on devices by percentage.
KEYBOARD
left, down Darken the screen.
right, up Brighten the screen.
q, enter, C-d Continue to next controller, or if at last, quit.
SEE ALSO
xbindkeys(1), xbacklight(1)
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