@PureJaguar Read this:
https://forum.recalbox.com/topic/22614/no-sound-over-hdmi

@romrom77 said in Weird artefacts then freeze:

I finally tried the raspi os and image is normal, except some buttons ("OK" "CANCEL"...) that don't appear, and some small graphic bugs...

If even on the Raspberry Pi OS you had graphic bugs, and, after all the tests that you did, knowing that with another RPi it worked ... I can only imagine that the problem is Hardware, unfortunately I can't suggest any more.

@oyyodams good to know, thanks mate 🙂

That disk usage looks seriously suspect - due to the way files are stored I didnt think it was possible to get to 100% usage.....

You have to go back to basics.
Fresh install again - is it fine?
If not, try any old microSD just to get up and running - still not fine?
Id then think it was the PI.......

@rockaddicted

It's fixed! 🙂 Seems like it had nothing to do with my permissions shenanigans then?

@Substring
J'ai pris l'habitude de poster sur les forums en anglais parce que je me dis que ça peut toucher plus de monde (qui pourrait avoir les mêmes questions, et questions stupides parfois...) 😄

Encore merci pour ta réponse rapide et ta compréhension...