Windows 10: Force Graphics Output with no EDID data

I’m looking for a solution to use a monitor that is not able to send the EDID data correctly.I know, I’m stretching the limits with my use case, however, I hope somebody knows how this is supposed to work.I’ve got a secondary display that uses a 20m high quality HTMI cable to connect to the CPU. However, with this cable, the EDID data can not be read properly anymore, on the other hand, the HDMI data would display just fine.I’ve used an EDID emulator like Delock EDID Emulator HDMI - HDMI Adapter to test the HDMI part and an I2C analyzer to check the EDID data. With the EDID emulator ev

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How to force output to monitor with invalid EDID?

A fairly old 27" tv stopped detecting signal via my pc's display port, but kept working on vga. It is dual-booting windows 10 and ubuntu. It shows no BIOS screens, but once ubuntu starts loading, it would detect and output a signal, albeit the wrong resolution.

From ubuntu's logs I found that the EDID was not valid, but ubuntu was guessing an output mode and trying anyway. The BIOS and Windows don't apparently do that if they don't get an EDID, and output no signal at all. So I'm stuck with crappy vga for running windows 10.

Under linux, fixing the problem was a simple matter of a few lines in terminal to add another output mode to switch to. All I can find from Microsoft is some complex stuff about creating an .inf file with data from the tv's manufacturer. That should not be necessary.

 

How to force output to monitor with invalid EDID?

EDID does work on VGA connections - that's where DDC and EDID started.

Depending on your graphics card there may be tools available to override the EDID without manually creating the INF file - such as Custom Resolution Utility (CRU) .

 

How to force output to monitor with invalid EDID?

I don't think VGA sends EDID information anyway. That is only done with digital connections.

You probably need to install an INF file to indicate to Windows the required data for resolution, scan frequencies etc. Whilst these INF files are generally available for PC monitors, not for TVs.

Microsoft is correct you would have to make your own INF file. These are just plain text files so not too difficult to mod one for something else with the correct values put in for your TV.

Manufacturers data and Notepad should do it. This seems to be essentially the same as using Linux by the sound of it, so why the big problem. Surely you know how to use Notepad.