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Laptop screen hang while shutdown

Hello everyone,

I have just installed Fedora 24 in my laptop (Dell Vostro 5480) yesterday and I am a newbie.

There is a problem with my install: When I shutdown my computer, after the Fedora splash screen, this message appears:

Kernel not configured for semaphores (System V IPC). Not using udev synchronisation code.
Powering off.
[ 2823.9533483] reboot: Power down
_

And the screen hang in there but any other devices like mouse or keyboard had turned off their lights. I only hear the sound of the chipset fan (I quite sure that there is no sound of the HDD). I tried some command like

poweroff

or

sudo shutdown -h now

but they are not work either.

Could somebody help me please. I have to press the power button many times now and I really worried about my computer.