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Vadim Zeitlin
e549a2b7e8
Generate these events on the systems running systemd, which provides org.freedesktop.login1 D-Bus interface, but require acquiring system power resource with the special new wxPOWER_DELAY "block mode" in order to do it. This means that existing applications need to be updated in order to start getting these events, but it has the advantage of avoiding to have to open the D-Bus connection on startup of every program, even if it's never going to use it, and also forces the program to provide the explanatory message, which is nice to have as it is shown by tools such as systemd-inhibit to show what could be preventing system sleep. Closes #23717.