I used to use night shift modes (makes the screen orange) and grayscale (less distracting) on previous computers. Does XFCE or Qubes have similar settings, ideally in dom0? If not dom0, then perhaps on a qube-by-qube basis?
using redshift here. comes from fedora repo, works in dom0
Concerning the blue light filter you may want to read this guide.
Introduction
This guide will help you to quickly configure blue light filter in Qubes OS with XFCE desktop environment.
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Redshift
Installation
type sudo qubes-dom0-update redshift in dom0 terminal and confirm installation by y
!
Remember that installing anything in dom0 is not recommended for security reasons
Configuration
Create confiig file - dom0 terminal:
cd .config
nano redshift.conf
You will create an empty file in path ~/.config/redshift.conf. Here you have to set …
Be aware that installing anything else in Dom0 may introduce security risks.
Got redshift working-- thanks.