• [ ] Xorg config
• [ ] Autorandr
• [ ] Xrandr
• [ ] Wayland todo / problems

XRandR

xrandr is a useful utility for configuring outputs for X. Most commonly, I use it to turn displays on and off, set the primary display, and position the displays relative to each other. For example, configuring my big screen as the primary monitor to the right of my laptop screen:

xrandr --output DP-1 --right-of eDP-1 --primary --auto

Or to configure the project display (which is not primary):

xrandr --output HDMI-2 --above eDP-1

• [ ] Need to add details about positioning the screens when one is smaller than the other

<aside> 😕 If xf86-intel-video is installed it changes the names of all the outputs from the form eDP-1 to eDP1 which breaks any scripts which have hardcoded values (like autorandr). This driver was uninstalled to fix the 5.10.x kernel crashes (see Troubleshooting and known issues).

</aside>

Setting brightness with light

In order to allow my user to use light to set the brightness (e.g. via the keyboard keys) without sudo, as per the Arch Wiki, this udev rule changes the permissions to allow the video group to change brightness:

ACTION="add", SUBSYSTEM="backlight", RUN+="/bin/chgrp video $sys$devpath/brightness", RUN+="/bin/chmod g+w $sys$devpath/brightness"