dbus-monitor --system,which is the "hibernate" signal?

[Luna Luan]

Hello everyone

i just want to know,which is the "hibernate" signal

i used the "dbus-monitor --system" to listen to the system signals then i made the system hibernate or suspend

i got a log file which contains some signals like IdleHintChanged, SystemIdleHintChanged, NameOwnerChanged, StateChanged, PropertiesChanged

i'd like to know which signals is related to the system's hibernate event?
IdleHintChanged? SystemIdleHintChanged? NameOwnerChanged? or others...

Thanks a lot
Regards

Luna