Ventoy - Black Screen with flashing underscore

[Midas]

Check your BIOS: confirm if you're booting in UEFI (likely) or Legacy mode -- setup differs slightly in each case. But I bet this is yet another case of having Secure Boot engaged.

After that, try to configure your USB drive in accordance to boot your Ubuntu ISO: for details, see https://www.ventoy.net/en/doc_news.html...