Comment 5 for bug 1507983

@dnord: This has nothing to do with xscreensaver, so not sure in how far that comment is helpful.

Regarding the actual bugreport: the screensaver-timeout setting only takes effect when the greeter is used as a lockscreen. So at login the setting is not honoured at all, instead the system default values are taken.
This is also why the behaviour of the greeter will differ between logging out and locking your session with respect to the screensaver.

So I would not categorize this as a bug, because the code is specifically written to work this way. Instead I would consider this a feature request.