Ne pas -> vraiment -> comprendre -> question -> OK : /
Sorry, I thought it would be clearer like that.
I was on the 90.5 version, everything worked, but it was unstable, it rebooted after watching a movie. That's why I wanted to test the latest Devel 09/04 (S912). After clean installation, the box starts. But, impossible to change the language, impossible to find the jackets "server error", impossible to find Addon, etc.