No image on boot in Windows 11

This seems to be a thing again for me. My Spectrum 4k is connected via HDMI 2.1 to an RTX 4080 FE. Almost every boot results in no image and I either have to unplug the HDMI cable from the computer or disconnect the power from the monitor. Only then will the monitor show the login screen.

I don’t think it’s the cable bc the behavior has occurred with multiple ones.

Any ideas on what else I should check?

Monitor is set to VRR on / response time set to high. G-sync is on in Nvidia CP. Once it’s on it’s fine but until then it’s getting kind of annoying.

Well, much like the BIOS issue, it seems that setting HDMI 1 to compatibility seems to fix the issue. But not sure what gets lost if the HDMI input isn’t set at 2.1.

Hi there,

The normal mode uses 384 bit EDID, which enables support for input signal up to 4K @ 144Hz 10 bit 4:4:4 HDR.

On the other hand, compatibility mode uses 256 bit EDID. This format has been used for more than 10-year, which makes it supported by a wider array of older devices. The drawbacks of this mode include limited support up to 4K@120Hz. There are also possible other functions being disabled as well.

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