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.TH XBACKLIGHT 1 "xbacklight 1.2.1" "X Version 11"
.SH NAME
xbacklight \- adjust backlight brightness using RandR extension
.SH SYNOPSIS
.B "xbacklight"
[\-help]  [\-display \fIdisplay\fP]
[\-get]
[\-set percent]
[\-inc percent]
[\-dec percent]
.SH DESCRIPTION
.I Xbacklight
is used to adjust the backlight brightness where supported. It finds all
outputs on the X server supporting backlight brightness control and changes
them all in the same way.
.IP \-get
Print out the current backlight brightness of each output with such a
control. The brightness is represented as a percentage of the maximum
brightness supported.
.IP "\-set \fIpercent\fP"
Sets each backlight brightness to the specified level.
.IP "\-inc \fIpercent\fP"
Increases brightness by the specified amount.
.IP "\-dec \fIpercent\fP"
Decreases brightness by the specified amount.
.IP \-help
Print out a summary of the usage and exit.
.IP "\-time \fImilliseconds\fP"
Length of time to spend fading the backlight between old and new value.
Default is 200.
.IP "\-steps \fInumber\fP"
Number of steps to take while fading. Default is 20.
.SH "SEE ALSO"
Xrandr(3)
.SH AUTHORS
Keith Packard,
Open Source Technology Center, Intel Corporation.