* [[https://www.howtogeek.com/658701/tn-vs.-ips-vs.-va-whats-the-best-display-panel-technology/|TN vs IPS vs VA screens]]

===== Create a virtual display in Linux =====
//this is useful if using something like, for example [[https://deskreen.com/lang-en|Deskreen]] to mirror a secondary display on another device when no other physical secondary display exists. [[https://github.com/augustoicaro/Immersed-Linux-Virtual-Monitors|original source]]//
  * Extensible Virtual Display Interface (EVDI) module: ''sudo apt install evdi-dkms''
  * load module: ''sudo modprobe evdi initial_device_count=4''
  * now if you do ''xrandr'' you'll see some virtual DVI ports available. Choose one to be your enabled port. For this example we'll choose ''DVI-I-2-1'' with format DVI-I-x-y e.g. x=2 y=1
  * add resolutions as you need:
    * existing resolution: ''xrandr --addmode DVI-I-2-1 "1920x1080"''
    * create a resolution. Example: 2048x1536:
      * ''cvt 2048 1536'' will return ''Modeline "2048x1536_60.00"  267.25  2048 2208 2424 2800  1536 1539 1543 1592 -hsync +vsync''
      * then do: ''xrandr --newmode 2048x1536_60.00"  267.25  2048 2208 2424 2800  1536 1539 1543 1592 -hsync +vsync''
  * force virtual port as connected: ''sudo sh -c "echo on > /sys/kernel/debug/dri/2/DVI-I-1/force"'' //note x=2 y=1 in this example//
  * From here use the standard display tools (GUI or otherwise) to set the monitor position etc.