<p>The thing about writing "I've never got round to debugging this" in a Mastodon post is that then you feel silly, and get round to debugging it. (Result!)</p><p>The reason why VLC was failing to inhibit my laptop screensaver, it appears, is because I was accidentally running two of them. light-locker was answering the D-Bus org.freedesktop.ScreenSaver Inhibit request and agreeing to not blank the screen. And then xfce4-screensaver, which hadn't got the memo, was blanking the screen anyway.</p>
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