J'ai trouvé ça : article

Et plus particulièrement :
The second reason, why we paid special attention to Advanced BIOS Features page is the CPU parameters that other mainboards often have singled out into a separate CPU Features section or placed closer to the page with overclocking friendly functions. There is nothing wrong with these parameters being placed into Advanced BIOS Features section, as they are not changed that frequently anyway. Only one of them – CPU EIST Function – caused us some problems. This parameter deals with power-saving technologies, such as Enhanced Intel SpeedStep Technology and is enabled by default. If we change the processor clock frequency multiplier, these power-saving technologies get disabled and even the CPU EIST Function parameter disappears from the Advanced BIOS Features section.

At this point, there is nothing wrong, but the problems appear when we return the processor clock frequency multiplier to its default value. CPU EIST Function appears again, but this time it is Disabled. The problem is that we change the multiplier in the MB Intelligent Tweaker section, and the CPU EIST Function should be enabled in a completely different section – Advanced BIOS Features. It would be rally great if at least one CPU EIST Function parameter could be moved to the MB Intelligent Tweaker (M.I.T) section, otherwise you can simply forget to change it back.
mais je sais pas quoi faire...
Ok la solution était simple, phenix l'avait dès le départ : flasher le bios.

Le passage en f7 s'est déroulé impeccablement et a corrigé tous mes soucis, les menus disparus sont là, les lignes bizarres au boot disparaissent.

Merci à vous tous pour votre aide.

edit : j'arrive pas à editer mon message en [résolu], si un modérateur pouvait s'en charger...
et le acpi-cpufreq module ? tu laisses tomber ?
A mon avis, maintenant que la fonction est activée dans le bios, le module se charge tout seul.
phenix01 wrote:A mon avis, maintenant que la fonction est activée dans le bios, le module se charge tout seul.
exact 🙂