I've seen GDM suspending the box after too much time without 
interaction.  My fix:

echo '[org.gnome.settings-daemon.plugins.power]' > 
/usr/share/glib-2.0/schemas/disable_powermgmt.gschema.override
echo sleep-inactive-ac-timeout=0 >> 
/usr/share/glib-2.0/schemas/disable_powermgmt.gschema.override
echo idle-dim=false >> 
/usr/share/glib-2.0/schemas/disable_powermgmt.gschema.override

glib-compile-schemas /usr/share/glib-2.0/schemas


Pat




On 03/09/2017 12:14 PM, 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.
>
> The best google-advice I see it to disable the systemd sleep and suspend targets:
> systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target systemd-suspend.service systemd-hybrid-sleep.service
> (now waiting for this machine to go to sleep).
>
> It is very worrysome that the syslog does not say who initiated the sleep/suspend sequence.
>
> That would be a show stopper for el7 - servers randomly going offline into uncommanded sleep/suspend.
> It does seem to happen rarely, but I have seen 3 or 4 machines do it at least once, so not rare enough.
>
> Any ideas?
>
>
> K.O.
>
>
> Here is the syslog contents:
>
> Mar  3 15:50:01 daqbackup systemd: Starting Session 1599 of user root.
> Mar  3 15:50:01 daqbackup systemd: Started Session 1602 of user root.
> Mar  3 15:50:01 daqbackup systemd: Starting Session 1602 of user root.
> Mar  3 15:50:16 daqbackup NetworkManager[1076]: <info>  [1488585016.1046] manager: sleep
> requested (sleeping: no  enabled: yes)
> Mar  3 15:50:16 daqbackup NetworkManager[1076]: <info>  [1488585016.1052] manager:
> sleeping...
> Mar  3 15:50:16 daqbackup NetworkManager[1076]: <info>  [1488585016.1061] manager:
> NetworkManager state is now ASLEEP
> Mar  3 15:50:16 daqbackup dbus-daemon: dbus[846]: [system] Activating via systemd: service
> name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
> Mar  3 15:50:16 daqbackup dbus[846]: [system] Activating via systemd: service
> name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
> Mar  3 15:50:16 daqbackup systemd: Cannot add dependency job for unit microcode.service,
> ignoring: Unit is not loaded properly: Invalid argument.
> Mar  3 15:50:16 daqbackup systemd: Starting Network Manager Script Dispatcher Service...
> Mar  3 15:50:16 daqbackup dbus-daemon: dbus[846]: [system] Successfully activated service
> 'org.freedesktop.nm_dispatcher'
> Mar  3 15:50:16 daqbackup dbus[846]: [system] Successfully activated service
> 'org.freedesktop.nm_dispatcher'
> Mar  3 15:50:16 daqbackup systemd: Started Network Manager Script Dispatcher Service.
> Mar  3 15:50:16 daqbackup nm-dispatcher: req:1 'connectivity-change': new request (4 scripts)
> Mar  3 15:50:16 daqbackup nm-dispatcher: req:1 'connectivity-change': start running ordered
> scripts...
> Mar  3 15:50:21 daqbackup systemd-logind: Delay lock is active (UID 42/gdm, PID 3237/gnome-
> shell) but inhibitor timeout is reached.
> Mar  3 15:50:21 daqbackup systemd: Reached target Sleep.
> Mar  3 15:50:21 daqbackup systemd: Starting Sleep.
> Mar  3 15:50:21 daqbackup systemd: Starting Suspend...
> Mar  3 15:50:21 daqbackup systemd-sleep: Suspending system...
> Mar  3 15:54:11 daqbackup kernel: PM: Syncing filesystems ... done.
> Mar  3 15:54:11 daqbackup kernel: Freezing user space processes ... (elapsed 0.046 seconds)
> done.
>
>