As for the reason, it should be mentioned in /var/log/pm-hibernate.log, or at least in /var/log/kern.log. But those are mostly suitable for attaching to bug reports. As for an error message for display, upower should provide that through DBusErrors.
As for the reason, it should be mentioned in /var/log/ pm-hibernate. log, or at least in /var/log/kern.log. But those are mostly suitable for attaching to bug reports. As for an error message for display, upower should provide that through DBusErrors.