Description

I bring here two solutions to change the PC connected in a single display without needing a full KVM (with support a video inputs), just a usb hub switcher is required.

How it works?

This turns off the current input display for a few seconds, giving time to the display detects the another system. In case of use through a button of switcher a service will be created and will stay checking if the keyboard was detected and disconnected, using it as trigger to run the display-manager.

Requirements

• 2 systems running linux
• A monitor with 2 video inputs, each one already plugged in each system
• An usb hub switcher Example:
  • 
• Any switch does works

Switching through hotkeys

• Save the file dspswitcher and use your key binding to run:

usr/bin/bash <path for dspswitcher>

Switching through button

Steps

• Save the file display-switcher in any place
• Save the file displayswitcher.service in /etc/systemd/system/
• edit this file adding the path for display-switcher shell script
• Reload the systemd daemon to read the new service unit file:

 sudo systemctl daemon-reload

• Enable the service to start at boot:

sudo systemctl enable displayswitcher.service

• Start the service:

sudo systemctl start displayswitcher.service

Now the display-switcher e will run automatically every time you start your PC.

Known issues

xset not finding displays

• This happens in some cases running using service, make a pull request with you know a solution