UGREEN KVM AK700 Works with Windows 10 Pro but Windows 11 Pro is Hopeless

Windows 11 has stricter and more complex handling of multi‑monitor and docking scenarios than Windows 10, and issues like this often come from how the KVM presents the displays’ capabilities (EDID, resolutions, refresh rates) to the OS.

From the described behavior:

• Both new monitors work directly on the Windows 11 PC → GPU and Windows 11 can drive both correctly.
• Both new monitors work through the KVM on Windows 10 → KVM hardware is basically functional.
• Windows 11 + KVM + 2 new monitors → only one display detected.
• Windows 11 + KVM + 1 old AOC + 1 new monitor → both detected.

This strongly suggests a compatibility/handshake problem between Windows 11’s multi‑monitor handling and how the KVM exposes two identical new monitors, not a general Windows 11 failure.

Given the available information, the most practical options are:

1. Use a different connection pattern
   Since Windows 11 detects one old + one new monitor through the KVM, one workable configuration is:
   • Put the “problem” pair (the two identical new monitors) on different paths, for example:
     • One new monitor via the KVM, the other new monitor directly cabled to the Windows 11 PC.
   • Or, if the old AOC is acceptable in the setup, keep the KVM driving one old + one new monitor for both PCs and use the third monitor as a dedicated/direct display for the Windows 11 machine.
2. Reduce complexity of the KVM scenario
   Windows 11’s docking and multi‑monitor experience is designed to preserve layouts and handle attach/detach events more intelligently, but this also means it is more sensitive to the exact capabilities reported by docks/KVMs and cables. As a result:
   • Avoid chaining adapters or using marginal cables (especially for 4K or high refresh rates).
   • Test at lower resolution/refresh rate on the new monitors (for example, 1080p/60 Hz) to see if Windows 11 then detects both through the KVM. If it does, the issue is likely related to bandwidth or how the KVM advertises high‑resolution modes.
3. Treat this as a hardware/KVM limitation rather than a Windows 11 defect
   The Windows 11 multi‑monitor documentation explicitly notes that docks and cables can limit supported resolutions and configurations, and that the “guaranteed” scenarios can be narrower than the “maximum/optimal” specs advertised. A KVM that works in one OS version is not guaranteed to expose the same capabilities in another, especially when the OS changes how it queries and validates display configurations.
4. If reverting to Windows 10 is considered
   If the Windows 11 upgrade was done on top of Windows 10 on the same device and it is still within 10 days of the upgrade, it is possible to roll back to Windows 10 while keeping files and migrated data. After 10 days, rolling back requires backing up data and performing a clean install of Windows 10 using installation media. Note that Windows 10 support ends in October 2025, after which no free security updates or technical assistance will be provided, so any decision to move back should factor in that timeline.

Without firmware/driver updates from the KVM vendor, the stable long‑term options are either:

• Adjust the monitor/KVM wiring so that Windows 11 is not required to see two identical new monitors through the KVM at once, or
• Use Windows 10 on that hardware, understanding the support end date.

References:

• Docking and multi-monitor Experiences
• Upgrade to Windows 11: FAQ