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Show HN: Multi-monitor KVM using just a USB switch (github.com)

397 points by fiddyschmitt · 919 days ago · 181 comments on HN

Article summary

The article presents a DIY solution for a multi-monitor KVM setup using a USB switch and a program called SimpleKVM, which allows users to switch between computers using a hotkey or the USB switch. This solution is an alternative to expensive KVM switches, especially those that support high-resolution and high-framerate displays. The program works by detecting USB device connections and disconnections, and then sending a DDC/CI command to the monitor to change its input source. The solution is currently available for Windows and macOS.

Main themes

  • KVM switches
  • Remote work
  • Multi-monitor setup
  • USB switches
  • DDC/CI commands
  • Synergy alternative

What commenters say

  • Some users find SimpleKVM to be a useful alternative to Synergy, a similar software, due to its ease of use and lack of installation requirements on other computers.
  • The use of KVMs can be beneficial for digital nomads who need to work remotely and may want to conceal their location from their employers.
  • Others disagree, stating that KVMs are not relevant to remote work or evading detection, and that VPNs or other remote access tools would be more effective.
  • A few users mention that they use KVMs to switch between multiple computers, but some monitors may not support this functionality or may have limitations, such as only allowing DDC commands on the active input.
  • Some users have successfully implemented similar solutions using different software and hardware, such as NirSoft ControlMyMonitor and Elgato Stream Deck.
  • The discussion also touches on the topic of overemployment, where individuals may use KVMs to manage multiple jobs or personal activities on separate computers.
  • There is a disagreement on whether SimpleKVM is useful for users who need to switch between multiple computers, with some finding it convenient and others preferring alternative solutions.
  • The use of SimpleKVM can be limited by the need for a Windows computer to run the program, which may not be suitable for users with different operating systems.