Ubuntu mate 18.04 stucks when go to suspend mode

hi everyone.

i’m using ubuntu mate 18.04 beta 1 on asus x556uq-dm1017 laptop and i had some problems when making it suspend.
when clicking on suspend menu item in the top panel and go back, the mouse stucks for a while. and when i try to shut it down the laptop, the operating system just don’t shut down. it only shows the background and just stuck.

other problem when i close the screen of the laptop and open it to
login again. when i login the touchpad is disabled, and when i try to
turn it off ro restart it it stucks again like the previous case.

does any one know what is the problem here?