Article Overview

To adjust the resolution on a KVM switch, configure your computer's display settings, ensure compatible cables and adapters, and verify the KVM switch supports your desired resolution and refresh rate.

Step 1: Check Monitor and KVM Specifications

Before adjusting settings, confirm your monitor's supported resolutions and refresh rates in its manual, as advertised high refresh rates may only work at lower resolutions . Ensure your KVM switch supports the resolution you want, especially if using 4K or high-refresh-rate displays .

Step 2: Verify Cables and Adapters

Low-quality or incompatible adapters can limit resolution. Use high-quality HDMI, DisplayPort, or VGA cables that meet the required specifications. For example, 4K 60Hz requires HDMI cables rated for 4K 60Hz and proper gauge (26AWG recommended for 16ft/5m cables), . Ensure all cables are securely connected to the KVM switch and monitors .

Step 3: Adjust Display Settings on Your Computer

Windows:

  1. Right-click the desktop and select Display Settings.
  2. Scroll down and click Advanced display settings.
  3. Choose the desired resolution and refresh rate from the dropdown menu, ensuring it matches your monitor's specifications .

Mac:

  1. Open System Preferences > Displays.
  2. Hold the Option key and click Scaled to see additional resolution options.
  3. For more detailed refresh rate options, use Terminal commands to list supported resolutions .

Step 4: Use the KVM Switch Menu (if available)

Some KVM switches or monitors with built-in KVM functionality allow you to select the input source and adjust resolution via the OSD (On-Screen Display) menu. For example, ASUS monitors let you select the input type (HDMI, DisplayPort, Type-C) and configure KVM settings through System Settings > USB Settings > KVM .

Step 5: Troubleshoot Common Issues

  • Resolution drops when switching devices: Ensure each device's output matches the monitor's supported resolution. Using converters (e.g., HDMI to VGA) may limit resolution .
  • Monitor flickering: Re-plug devices, try different cables, or lower the resolution temporarily .
  • 4K 60Hz not working: Verify both input and output cables support 4K 60Hz and adjust the computer's display settings .
  • USB or HDMI ports not working: Test devices directly with the monitor, check cable lengths, and ensure total USB cable length is within limits (typically 10ft/3m), . By following these steps, you can ensure your KVM switch displays the correct resolution and refresh rate for all connected devices.

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