How do I control brightness properly

milo64 · 2014-04-11 16:52:14

For a very long time, I've made and used a script that does this:

BRIGHTNESS=$(< /sys/class/backlight/acpi_video0/brightness)
echo "mypassword" | su -c "echo $(( $BRIGHTNESS - 1)) > /sys/class/backlight/acpi_video0/brightness"

in order to reduce brightness and prevent eye strain.
I did the opposite to the 'brightness increase' shell script.
And, I did "bind [ run-shell -b 'b-down'" "bind ] run-shell -b 'b-up'"

It does work, but I have to admit that it isn't secure, since it reveals my password.

I wonder if someone knows a secure workaround for this?
It would be nice if I can access the workaround instantly through tmux without requiring password.

Thanks in advance.

jasonwryan · 2014-04-11 19:05:48

Use xbacklight?

nullified · 2014-04-11 19:09:20

check out xbacklight and the other stuff on that wiki.

I bound two of my keys to the following commands:

xbacklight -dec 10

and

xbacklight -inc 10

and it works fine.

Edit: I just noticed that this wiki has some info. on redshift as well. If you're particularly interested in doing this to reduce eye strain I highly recommend checking it out. It automatically adjusts the screen temp. when the sun goes down and comes up. I can no longer do without it!

Last edited by nullified (2014-04-11 19:11:53)

milo64 · 2014-04-12 05:23:15

... the reason I use tmux because I don't have X installed and I don't use X at all.
thus, I don't have xbacklight.

Last edited by milo64 (2014-04-12 05:23:51)

orschiro · 2014-04-21 17:17:17

Does xbacklight work if you export the display variable before?

$ export DISPLAY=:0 ; xbacklight -dec 10

Arch Linux

#1 2014-04-11 16:52:14

How do I control brightness properly

#2 2014-04-11 19:05:48

Re: How do I control brightness properly

#3 2014-04-11 19:09:20

Re: How do I control brightness properly

#4 2014-04-12 05:23:15

Re: How do I control brightness properly

#5 2014-04-21 17:17:17

Re: How do I control brightness properly

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