Display failed to synchronize with the KVM.

Part No.: CCHW3000-2K-D29 - 6-121377-81344 - Question: Display failed to synchronize with the KVM.

Question:
We connected the display to two computers through an Atten KVM switch, but the display failed to synchronize with the KVM. However, when tested with displays from other manufacturers, the KVM functioned normally.

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Findings / Solution:
After further testing, we determined that the issue originates from the PC side rather than the display or KVM switch.

The affected PC is equipped with an HDMI 1.4 port, which does not support Microsoft HDR requirements. As a result, synchronization issues may occur when connected through the KVM.

Our testing confirmed that:

  • The display works properly when connected to a PC with an HDMI 2.0 port.
  • The display also works properly with Linux systems using HDMI 1.4, as Linux does not enforce the same compatibility checks as the Windows operating system.

Based on these results, the issue appears to be related to the Windows/HDMI 1.4 compatibility limitation rather than a fault with the display or KVM switch.