I am facing the same problem as @ricardolandim + when opening Siri or "Voice memo", the system restarts.
Also, after updating to the latest BIOS and EFI folder from @ MaLd0n, there is a lot of graphics issue. One issue is that after Apple logo and before the login screen, there is severe graphics glitch, which doesn't stop, and cannot use system. After many restarts, one time it will work, but the mouse cursor will be glitchy. After restart, again whole screen glitch comes and cannot use. New EFI folder solved slow boot and audio, but screen is impossible to use without 5-6 force restarts every time.
Also, screen stops working after sleep with new EFI, even after adding -noDC9 to boot arg. System keeps running as system sounds (like volume change and notifications) are audible.
Using latest BIOS version DKEC49WW, PC model S145-81W800TFIN
Glitch pictures attached, there is always different designs/patterns of glitch
Glitch.zip