@Zing

It's possible that there is an issue with EDID detection but I thought that was the whole
purpose of forcing a resolution and refresh rate....

I have tried with the other HDMI port but it behaves the same way and I tried with another HDMI adapter with the same result.

I do believe there is a bug with the Rpi4 version but it's odd that this is where it would manifest
itself.

I really like recalbox so I I'll investigate some more and I am willing to wait for the bug to be fixed. I'm use to using open source projects so I've developed a healthy amount of patience
so I'm good.

thanks for your help!

@Zing

I forgot to upvote your help.

Thanks!

@Zing

It's possible that there is an issue with EDID detection but I thought that was the whole
purpose of forcing a resolution and refresh rate....

I have tried with the other HDMI port but it behaves the same way and I tried with another HDMI adapter with the same result.

I do believe there is a bug with the Rpi4 version but it's odd that this is where it would manifest
itself.

I really like recalbox so I I'll investigate some more and I am willing to wait for the bug to be fixed. I'm use to using open source projects so I've developed a healthy amount of patience
so I'm good.

thanks for your help!

@Zing
Have you tried global.videomode=default?
yes, that is the first mode I used
Have you tried with another emulator/core?
yes I cycled hrough several

I want to add that most of the systems listed do not display anything, only the audio works.

I tested with a different monitor as you suggested with the following config.

global.videomode=default

I also commented the following in config.txt
#hdmi_group=2
#hdmi_mode=18

This worked, see attached image.

Recalbox loads games correctly when using a raspberry pi 3.

see video
https://youtu.be/sQ73Ow83Xuo

@Zing

I just posted a video so you can see what I,m talking about.
https://youtu.be/VeglywfdoQU

I downloaded Recalbox 7.1.1-Reloaded for the raspberry pi 4 and I loaded unto the sd card several ways.

1- raspberry pi imager.
2-sudo dd if=./image of=/dev/sdX
3-using the ubuntu disk imager

All with the same result.

@Zing

I'm still putting this post together.
I was going to post on the older thread but I was instructed to start a newer one.

I have a monitor that I sort of made from an iMac G3 DV. This monitor has a resolution of
1024x768 @ 75 Hz which is supported by the raspberry pi.

Recalbox 7.1.1-Reloaded

Indeed, I have used this monitor with several operating systems without any issues.

Here is the configuration I'm using.

config.txt

hdmi_group=2
hdmi_mode=18

recalbox.conf

global.videomode=DMT 18 HDMI

This same configuration works fine with recalbox on a raspberry pi 3

Here is a link to a video showing what I am describing.

https://youtu.be/VeglywfdoQU

Re: Not output video Recalbox 7- rpi4 in my TV