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Author Topic: Laptop monitor white balance  (Read 658 times)

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Offline Clownrazer

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Laptop monitor white balance
« on: January 17, 2018, 06:22:18 pm »
Using a Lenovo G570 core i5 laptop with intel graphics.  Does anyone know a way of tweaking white balance, my whites are a bit pink.  The viewing angle isn't great, and can make it worse, but even straight on I need a little bit of a cooler white.  Prefer a GUI method if available but I do get into terminal in a few areas and am always willing to copy-paste a tried and true script. 

Offline PCNetSpec

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Re: Laptop monitor white balance
« Reply #1 on: January 17, 2018, 06:52:27 pm »
you could try installing redshift
Code: [Select]
sudo apt-get install redshift
then run:
Code: [Select]
redshift -O 7000K


Redshift accepts user-defined colour temperatures in the format:-

redshift -O <desired color temperature in K>

Default = 6500K



The other option would be to use xrandr
Code: [Select]
xrandr --output LVDS1 --gamma 1:1:1.1
where LVDS1 is the output, and gamma is red:green:bue .. so the above turns up the blue gamma by 0.1



In either case you're going to need to add the command you settle on as an autostart command if you want it run at login



Another way to adjust colour temperature/brightness on monitors (seperate monitors can be adjusted individually) is to install brightness-controller from this ppa:
https://launchpad.net/~apandada1/+archive/ubuntu/brightness-controller?field.series_filter=xenial

or you can install it in Peppermint 7/8 by downloading this .deb file
https://launchpad.net/~apandada1/+archive/ubuntu/brightness-controller/+files/brightness-controller_2.0.2_all.deb

and double-clicking it to install.

Be aware, though you can manually adjust the settings and save colour profiles then load them, I've found no way to do automatically apply a profile at startup/login.

Also be aware this installs quite a few dependencies.

More info here:
http://www.omgubuntu.co.uk/2017/05/adjust-external-monitor-brightness-ubuntu

Github:
https://github.com/LordAmit/Brightness
« Last Edit: January 17, 2018, 07:57:26 pm by PCNetSpec »
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Offline Clownrazer

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Re: Laptop monitor white balance
« Reply #2 on: January 19, 2018, 02:39:10 am »
Thanks, Brightness Controller works great!  Worth including in the base build or is it too big/buggy?  - seems like a basic function of many modern OS to control white balance.