diff backlight.1 @ 16:0d923f0155dd

doc: improve documentation
author David Demelier <markand@malikania.fr>
date Fri, 11 Oct 2019 13:12:26 +0200
parents 282ec7c30c04
children 0de3886f98ad
line wrap: on
line diff
--- a/backlight.1	Fri Oct 11 12:58:48 2019 +0200
+++ b/backlight.1	Fri Oct 11 13:12:26 2019 +0200
@@ -51,6 +51,25 @@
 .Ar percentage
 value.
 .El
+.\" SYSTEM SUPPORT
+.Sh SYSTEM SUPPORT
+.Ss Linux
+On Linux, you need to have ACPI Video support either as module or built-in the
+kernel.
+.Pp
+You may use
+.Nm
+as non-root user if you create appropriate udev rules to make files under
+.Pa /sys/class/backlight
+writable by a group or per user.
+.Ss FreeBSD
+Access to brightness under FreeBSD requires super-user, you may need to run
+.Nm
+as root or use setuid permission for non-root users.
+.Pp
+You also need to load
+.Xr acpi_video 4
+module at boot.
 .\" AUTHORS
 .Sh AUTHORS
 .Nm