Redshift/nightshift, software that controls the 'redness' of the screen through the
Attachment:
redshift.png [ 4.04 KiB | Viewed 14337 times ]
icon in the lower right corner of the tool panel also controls the 'brightness'
Redshift/nightshift has three settings, Off/ Civilised/ Nightshift.
Off, is off. There is no adjustment of the brightness OR colour of the display.
Civilised is full colour temp and brightness during the day while the sun is above the horizon, but after the sun goes down the screen slowly dims to 30% backlight and the colour temperture warms to be easy on the eyes for night time work.
The nightshift mode is the same, except as the sun goes gown, the backlighting and the colour temperature go as low as possible. This is great for running at night. (Some work still needs to be done for visual accuity, but that's the nature of the beast.)
You toggle between the three settings by clicking the icon. Most of the time it isn't noticeable except if it's after the sun has gone down, or a gps has not been connected to the system and it still 'thinks' it's in Panama.
Most of the time this works flawless, except if you get older, or need extra backlighting for other reasons.
If you manually adjust the settings, the next time the system verifies the brightness/redness setting it will revert to to the default settings. Handy, or frustrating, depending how you look at it.
This is why I wrote this little script to set the brightness for *my favourite setting*, the civilised setting, to give a new goal.
Open a terminal (
<ctrl><alt><t>) and at the prompt enter:
Code:
gksu medit /usr/local/bin/brimmer /usr/share/applications/brimmer.desktop
This open two blank files in the text editor.
In the first blank file, paste in:
Code:
#!/bin/bash
# Brighter-Dimmer
# This script can be used in the Navigatrix system
# in conjunction with redshift/nightshift display
# modifications to set 0-100% of LCD Backlight Range
# of the 10 step backlight scale (0-9) provided
# by most current LCD displays
brimmer=$(zenity --title "Brimmer - the brighter dimmer" --scale --text "Set the Brightness, or dimness, on a scale of 0-100" --min-value=0 --max-value=100 --value=30 --step 10)
#
# Navigatrix sets the colour temp to create the best of all possible worlds
# OFF, no change; Civilised, easy on the eyes night use; and FULL, for the
# rhodopsin sparing red as you can get with what you've got setting.
# The config file is...
shiftsettings=/usr/local/bin/nightshift
# read it
cat $shiftsettings >$shiftsettings.new
# Locate and substitute the new input values and re-write the file.
# To change the backlight from ONLY the 'Civilised' setting to both 'light' and 'dark'
# change 'lightx=' to 'x='. Change it to 'darkx=' for ONLY the 'Night Vision Red'
# Change it to anything else to have it not work at all.
sed "s/lightx=\"\?[[:digit:]]\{1,3\}\"/lightx=\"$brimmer\"/g" <$shiftsettings.new >$shiftsettings
# Do it even if it's wrong.
nightshift restore
# ^ the syntax: nightshift [dark|light|toggle|restore|off]
# ...but cleanup when you're done.
rm $shiftsettings.new
In the second blank file, paste in:
Code:
[Desktop Entry]
Name=Brighter Dimmer
Comment=Brighter Dimmer to re/set LCD backlight for Navigatix Redshift/Nightshift
Exec=gksu --description /usr/share/applications/brimmer.desktop /usr/local/bin/brimmer
Terminal=false
Type=Application
Categories=Settings;
Make the script you created executable:
Code:
sudo chmod +x /usr/local/bin/brimmer
Now, the Menu entry is created in "Preferences". It will be near the top called "
Brighter Dimmer"
When you run this application, the brightness/dimness of the "civilised" setting will stay at the level you want, and not revert to 30% backlighting.
Does that answer your question, Ken?
