On Feb 20, 2023, at 9:44 AM, Celejar <cele...@gmail.com> wrote:
> 
> It turns out that the DEACTIVATEs were being sent by the Xfce Power
> Manager's Presentation Mode. I'm not sure I was even aware of that
> mode's existence, but it apparently has a long history of becoming
> turned on without the conscious intention or awareness of the user :)

Good to know! 

So, it sounds like you were seeing XFCE invoking "xscreensaver-command 
-deactivate" directly, is that right? That would have been happening here:

https://gitlab.xfce.org/xfce/xfce4-power-manager/-/blob/2969f0b1ddb60ccda2989c6da6977ab51c75dfd7/src/xfce-screensaver.c#L122

However it looks like that's a fallback, and first it would have tried to 
connect to DBus, meaning you should have seen diagnostics from 
xscreensaver-systemd instead:

https://gitlab.xfce.org/xfce/xfce4-power-manager/-/blob/2969f0b1ddb60ccda2989c6da6977ab51c75dfd7/src/xfce-screensaver.c#L233

Is xscreensaver-systemd not running for you?

-- 
Jamie Zawinski • jwz.org • dnalounge.com

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