Originally Posted by george_toolan
This is probably a feature of your motherboard.
Check your efi/bios setup and enable all power saving options including EuP 2013 and disable all wake on usb et al options.
Thanks for the answer, but I have tried many combination of BIOS option but no one is useful for this problem.
I think that this problem isn't a BIOS option problem, but a linux problem (maybe I have to set some option at startup or at shutdown) because in Windows everything works normally.
The keyboard and mouse are shutted down normally (when computer is powered off I can't switch on Block Num for example)
Any other suggestions?