https://bugzilla.kernel.org/show_bug.cgi?id=198947

--- Comment #6 from Frank (bugzi...@terrortux.de) ---
After an detail look at the device, it looks like it will not enter corrent the
sleep state. Bacause with the working kernel the led on the cover will do
flashing after enter the sleep state. But with the failed kernel, the led don't
flashing after close the cover.

Doing the same, when the device is connect to the power supply, then it will
work.
Only when it runs on battery power, it will fails.

cat /sys/power/mem_sleep 
4.14.18:
        s2idle [deep]
4.15.12:
        s2idle [deep]
4.15.14(vanilla):
        s2idle [deep]   
4.16-rc7(vanilla):
        s2idle [deep]

Kernel 4.16-rc7 will work on battery and mains power.
All other except 4.14.18 and 4.16-rc7 will fail on battery power.

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