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| lwc:hardware:displays [2021/08/14 07:32] – created John Harrison | lwc:hardware:displays [2025/01/22 22:22] (current) – John Harrison |
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| * [[https://www.howtogeek.com/658701/tn-vs.-ips-vs.-va-whats-the-best-display-panel-technology/|TN vs IPS vs VA screens]] | * [[https://www.howtogeek.com/658701/tn-vs.-ips-vs.-va-whats-the-best-display-panel-technology/|TN vs IPS vs VA screens]] |
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| | ===== 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. |
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