On Thu, 9 Mar 2017, Konstantin Olchanski wrote:

> Hi, there. I wonder if anybody else is seeing the same problem with el7:
>
> The symptoms are: no ping, dead video, dead keyboard. After power cycle,
> syslog shows that the system has attempted to go into sleep or suspend
> or whatever they call it.
>
> This is very strange, usualy a system will go into suspend mode when you
> close the laptop lid, but these are not laptops. They are normal desktop
> machines (and at least in one case, there is no local user to blame for
> pressing the "sleep" button).
>
> So what's in the syslog:
> - normal activity (systemd spam)
> - network manager reports "sleep requested"
> - some kind of nm_dispatcher activity
> - systemd reaches sleep and suspend targets.
> - continues spewing sundry messages, never recovers (never goes into actual sleep).
>
> The machine is effectively dead after network manager put the network interfaces to sleep.

Can the machine be made to respond to wake-on-lan ?
If so, setting that up *might* reduce the pain when this happens again ...