use of suspend leads to random unwanted shutdown

[Frédéric Bron]

>> If I use suspend some time and until I turn off the computer
>> completely (i.e. not by using suspend), when the computer is on, it is
>> susceptible to shutdown automatically at any time.
>
> Check your cooling fans spin up again when it wakes up.

looks fine. The processor temperature goes up to 100°C when in use,
55°C when idle. The fan speeds goes up when in use.
Frédéric