On the Carrier Board P3509_A01,NX is powerd on.log in ,and the desktop show normal.
Press the button on the postion of PWR_BTN and GND.the ubuntu Pop up selection box button（Lock，Suspend,Restart,Shutdown）.We do not select anay one，Keep no operation.
we find some NX will shutdown 20S later。
some NX will keep the showed selection box button always。
all ubuntu of NX is 18.04.
I want to know the reason about the difference .