It was indeed an issue related to the format of the runcommand-onstart.sh file - it was in DOS format. I opened/resaved it in MAC format (using nano). Problem solved. Thank you for your help!

Thanks!!! That solved the problem!

@theissdev I should also mention that this was really my only issue in moving from the Pi 3B+ to the Pi4. Everything else was super simple. Ledspicer required a manual reinstall on the Pi4 simply due to being a bin exe, but that was really it. Most of the old -> new stuff (artwork, custom theme, etc.) all ported over w/ 0 issues. Def. worth the wait. Thanks guys!

I've been reading a littl emore and it seems it is possible to ignore the screens edid data. Instead I can use an edid.dat file with the values I want.

I think I have to add hdmi_ignore_edid and hmi_edid_file to config.txt

The only thing I don't know is how to create a an edid.dat file with the correct information.
If someone knows (or even better, give me a better edid file) how to do this I think this problem is solveable.

@paulo75 you'd be better asking questions at a specialist Retroarch forum. This forum is for Retropie and the varients of it for Pi and Linux installs really.

@mr-berlin
I see this post is a little old, but I have exactly the same problem. Did you find a solution in the end?

I have read the posts above and will try out the suggestions, but I was hoping that "scaping" would automate the process so that I did not have to manually download or re-code all those videos.

FYI - Raspberry Pi 4B 1GB Retropie 4.7.4 - Scraped with Steven Self’s optional scraper package.

@dankcushions

Yeah it does and it’s real nice and is a great option for sure.

I think maybe I’ll go into a video editor and try to make a single video to use just for the fun of it.

@e4rthdog said in Weekly Build PI4 4.5.10 - TV will keep blanking out, flashing or not working at all.:

In any case i learned a lot at least :)

I'd say so myself.

Most likely the USB stick is not 'mounted' (therefore inaccessible) when the splashscreen starts, so the video cannot be read and the splashscreen fails. Copying it to /opt/retropi.. will copy the splashscreen on the SD card, which is immediately available on boot.

@herb_fargus Yes! I love your splash screen.

@Veggirop The cable looks correct, but it might be the cause of the B&W image (i.e. colours not being correctly set).
Take a look at this RPI forum topic, which has a similar symptom and was solved by changing the cable.

I love it

@Sepsism maybe KOF 94 or 2003, I love the falling letter

@cwalk828 Usually this is up to the theme, the scraper just downloads the files (images/videos) and adds them to the gamelist.xml used by Emulationstation. But I don't think this is supported by Emulationstation (playing video in the bg) - if you're interested in this kind of display I think Pegasus (another front-end) might support this.

@retropieuser555 please open a new topic and provide details of set up.

Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

@mitu so far I've changed every setting I can find to fix this but it's either fully stretched or displays in the far right bottom corner with most of the screen cut off including the retroarch menu
I gave up editing config files manually and just adjusted the screen from within retroarch gui, it ended up being an odd size resolution tho