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I have a Samsung smart TV for work that has never been connected to a network. It insists on an identification check whenever a new device is connected to an input. It doesn't have access to the Samsung database so it just spins its wheels until you clear the overlay.

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It does that even with network access (I didn't see any additional traffic when it happens in a packet capture). I have to use a programmable HDMI splitter that presents an EDID when the real input is off just to get rid of that behavior. My computer resuming from sleep triggers it.

Our hardware has valid EDIDs. Just nothing that Samsung would know about.

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