.TH ADJBACKLIGHT 1 ADJBACKLIGHT
.SH NAME
adjbacklight - Convenient method for adjusting the backlight on your portable computer
.SH SYNOPSIS
.B adjbacklight
(-c | -w | [-g | -s
.IR LEVEL
|
.IR LEVEL ]
[-a |
.IR DEVICE ...])
.SH DESCRIPTION
.B 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.
.PP
.B adjbacklight
installs with the set-uid bit set, to enable any user to
change the backlight on the computer.
.PP
.B adjbacklight
was originally designed for small netbooks that are not running
.BR X .
However, it is still suitable for desktop computers and can
be used inside
.BR X .
In fact it seems to work for all machines with backlight, which
is not true for
.BR xbacklight (1).
.V adjbacklight
uses
.IR /sys/class/backlight .
.B adjbacklight
as been retrofitted to be convenient for use inside
.B X
on desktop computers, with commands that lets it be used
non-interactively with hotkeys set up in
.BR xbindkeys (1).
.SH OPTIONS
.TP
.BR \-c ,\  \-\-copyright ,\  \-\-copying
Display copyright information.
.TP
.BR \-w, \  \-\-warranty
Display warranty disclaimer.
.TP
.BR \-a, \  \-\-all
Run for all devices, including ACPI devices.
.TP
.BR \-g, \  \-\-get
Get average brightness on devices.
.TP
.BR \-s, \   \-\-set \ \fILEVEL\fP[%]
Set brightness on devices.
.PP
.TP
.BR \+ \fILEVEL\fP
Increase brightness on devices by actual value.
.TP
.BR \- \fILEVEL\fP
Decrease brightness on devices by actual value.
.TP
.BR \= \fILEVEL\fP
Set brightness on devices by actual value.
.br
.TP
.BR \+ \fILEVEL\fP%
Increase brightness on devices by percentage-points.
.TP
.BR \- \fILEVEL\fP%
Decrease brightness on devices by percentage-points.
.TP
.BR \= \fILEVEL\fP%
Set brightness on devices by percentage-points.
.br
.TP
.BR \+ \fILEVEL\fP%%
Increase brightness on devices by percentage.
.TP
.BR \- \fILEVEL\fP%%
Decrease brightness on devices by percentage.
.TP
.BR \= \fILEVEL\fP%%
Set brightness on devices by percentage.
.SH "SEE ALSO"
.BR xbindkeys (1),
.BR xbacklight (1)
.PP
Full documentation available locally via: info \(aq(adjbacklight)\(aq
.SH AUTHORS
Principal author, Mattias Andrée.  See the COPYING file for the full
list of authors.
.SH LICENSE
Copyright \(co 2015  Mattias Andrée
.br
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it.
.br
There is NO WARRANTY, to the extent permitted by law.
.SH BUGS
Please report bugs to https://github.com/maandree/adjbacklight/issues or to
maandree@member.fsf.org