Fail to enter into S4 by pushing power button sometimes

[Zhao Fan]

Bug detailed description:
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Sometime system may fail to enter into S4 by pushing power button. The BIOS light will change but system will just stay working but not going into S4 state. In such situation, just use type command "ume-hibernate" in terminal will make system enter into S4 successfully.

Reproduce steps:
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(1) Boot the system
(2) Push power button
(3) System can not enter into S4 state sometimes
(4) Type command "ume-hibernate" in terminal, system will enter into S4 state

Current result:
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System may not enter into S4 by pushing power button sometimes

Expected result:
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System could enter into S4 state successfully every time by pushing power button

Basic root-causing log:
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[May Xie (may-xie)]

Assign it to m10 since this is fixed