@dam_j I can only imagine that the problem then is a driver incompatibility with your video card, and it's not something a user can solve on their own.
Some options:
Open an issue in gitlab (check if there is not already a similar issue open), and wait for a response from one of the developershttps://gitlab.com/recalbox/recalbox/-/issues Go to our official Discord channel and see if anyone has any other ideas (there's a chance a developer will answer you)
https://discord.com/invite/NbQFbGM Invest financially in the project by becoming a Patron Recalbox, and have some special advantages, such as access to an exclusive discord channel:
https://www.patreon.com/recalbox?utm_source=recalbox&utm_medium=website