Forum Debian Users Gang

/etc/systemd/logind.conf

HandlePowerKey=suspend

  HandlePowerKey=, HandlePowerKeyLongPress=, HandleRebootKey=, HandleRebootKeyLongPress=, HandleSuspendKey=,
       HandleSuspendKeyLongPress=, HandleHibernateKey=, HandleHibernateKeyLongPress=, HandleLidSwitch=,
       HandleLidSwitchExternalPower=, HandleLidSwitchDocked=
           Controls how logind shall handle the system power, reboot and sleep keys and the lid switch to trigger
           actions such as system power-off, reboot or suspend. Can be one of "ignore", "poweroff", "reboot",
           "halt", "kexec", "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate", "lock", and
           "factory-reset". If "ignore", systemd-logind will never handle these keys. If "lock", all running
           sessions will be screen-locked; otherwise, the specified action will be taken in the respective event.
           Only input devices with the "power-switch" udev tag will be watched for key/lid switch events.

           HandlePowerKey= defaults to "poweroff", HandleRebootKey= defaults to "reboot", HandleSuspendKey= defaults
           to "suspend", HandleHibernateKey= defaults to "hibernate", HandlePowerKeyLongPress= defaults to "ignore",
           HandleRebootKeyLongPress= defaults to "poweroff", HandleSuspendKeyLongPress= defaults to "hibernate",
           HandleHibernateKeyLongPress= defaults to "ignore".  HandleLidSwitch= defaults to "suspend".
           HandleLidSwitchExternalPower= is completely ignored by default (for backwards compatibility) — an
           explicit value must be set before it will be used to determine behaviour.  HandleLidSwitchDocked=
           defaults to "ignore". If the system is inserted in a docking station, or if more than one display is
           connected, the action specified by HandleLidSwitchDocked= occurs; if the system is on external power the
           action (if any) specified by HandleLidSwitchExternalPower= occurs; otherwise the HandleLidSwitch= action
           occurs.