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Martin Flöser authored
Summary: KScreenLocker checks whether power management is inhibited on idle time out. So far this used a sync and blocking dbus call. This change makes the check async. KScreenLocker connects to the InhibitionsChanged signal provided by powerdevil and queries the current state in an async way each time the signal gets emitted. When KScreenLocker hits an idle connection it has the knowledge wheter power management is inhibited and does not need to perform the blocking call any more. It's important for KScreenLocker to not have blocking calls as it's used inside the Wayland compositor and can by that easily create dead-lock situations (e.g. PowerDevil waiting for the Wayland compositor and the compositor waiting for the reply). Reviewers: bshah, broulik Subscribers: plasma-devel Projects: #plasma Differential Revision: https://phabricator.kde.org/D884
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