kyrios wrote:I think mate-screensaver is a simplified version of Xscreensaver, isn't it?
Nah, mate-screensaver is a fork of the old gnome-screensaver as it still existed in Gnome 2. Though, I guess in the transition and renaming of it, something went wrong between the old org.gnome settings and the new org.mate settings, as in Gnome 2, the screensaver's GUI did at least work as expected.
Yeah, let's hope this gets fixed soon. I'll also try to file a bug report for these issues if I find some time.
Oh, xscreensaver might even work better (haven't tried with Mint 15 MATE), and though it has many more options, especially per-screensaver settings, I doubt its interface was redesigned in the recent year. And if it wasn't, well, it does look quite antiquated by now. Wouldn't really fit Mint's overall theme, in my opinion.