`xdg-screensaver reset` does nothing on gnome but fails silently, returning exit code 0
If you add --print-reply you can at least get a non-zero exit status and this message:
Error org.freedesktop.DBus.Error.UnknownMethod: No such method 'SimulateUserActivity'
I believe this is the where gnome rejects the call:
I don't know if there's a replacement API, I couldn't find one.
I'm using Arch Linux,
extra/gnome-shell 3.20.3-1 (gnome) [installed]
extra/xdg-utils 1.1.1-3 [installed]
Though the version reported by xdg-screensaver is different:
❯ xdg-screensaver --version
xdg-screensaver 1.1.0 rc3