4a184d74d5
Since 4cae9b5b1132, and indirectly before that as well, the MetaMonitorManager::power-save-mode-changed is emitted even when the power save mode didn't actually change. On Wayland, this causes a mode set and therefore a stuttering. It became more proeminent with the transactional KMS code. Only emit 'power-save-mode-changed' when the power save mode actually changed. https://gitlab.gnome.org/GNOME/mutter/merge_requests/674