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-Convenient method for adjusting the backlight on your portable computer.
+NAME
+ adjbacklight - Convenient method for adjusting the backlight on your portable computer
+
+SYNOPSIS
+ adjbacklight (-c | -w | [-g | -s LEVEL | 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.
+
+ 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
+ -c
+ --copyright
+ --copying Display copyright information.
+
+ -w
+ --warranty Display warranty disclaimer.
+
+ -a
+ --all Run for all devices, including ACPI devices.
+
+ -g
+ --get Get average brightness on devices.
+
+ -s
+ --set LEVEL[%] Set brightness on devices.
+
+ +LEVEL Increase brightness on devices by actual value.
+ -LEVEL Decrease brightness on devices by actual value.
+ =LEVEL Set brightness on devices by actual value.
+
+ +LEVEL% Increase brightness on devices by percentage.
+ -LEVEL% Decrease brightness on devices by percentage.
+ =LEVEL% Set brightness on devices by percentage.
+
+ +LEVEL%% Increase brightness on devices by relative percentage.
+ -LEVEL%% Decrease brightness on devices by relative percentage.
+ =LEVEL%% Set brightness on devices by relative percentage.
+
+SEE ALSO
+ xbindkeys(1), xbacklight(1), sys_class_backlight(5)
+
+ Full documentation available locally via: info '(adjbacklight)'
+