Re: dimm background light

[Klaus Weidner <kw@w-m-p.com>]

On Tue, Oct 21, 2003 at 04:10:50PM +0000, Joerg Sommer wrote:
> how can I dimm or turn off the background light on the console?

If you're running zapmd, you can echo a value from 0 to 100 to /dev/zapmd
(or use the "light" shell script included w/ my distribution).

This doesn't give you maximum brightness though on the SL-C7x0, there you
can instead use "echo 0xFFFF > /proc/driver/fl/corgi-bl" (or any hex
value from 0..0xffff.

I've appended the "bl" shell script I'm currently using on my C750 which
keeps state information saved in /tmp/llevel.dat, so that the Fn-OK
shortcut key in the fbvnc client will cycle through a series of
brightness levels.

-Klaus

#!/bin/sh

[ -e /dev/zapmd ] || exit 1

if [ ! -f /proc/driver/fl/corgi-bl ]
then
	echo light > /dev/zapmd &
	exit 0
fi

LEVFILE=/tmp/llevel.dat
LEVEL=0x0105
[ -f $LEVFILE ] && LEVEL=`cat $LEVFILE`

case $LEVEL in
0x0000) LEVEL=0xFFFF ;;
0xFFFF) LEVEL=0x0105 ;;
0x0105) LEVEL=0x000B ;;
0x000B) LEVEL=0x0005 ;;
0x0005) LEVEL=0x0001 ;;
0x0001) LEVEL=0x0000 ;;
esac

echo $LEVEL > /proc/driver/fl/corgi-bl
echo $LEVEL > $LEVFILE