Hello, I'm running Xfce4 on a recent install of Sid. I have configured Xfce4 to "Lock screen before sleep" (in Session and Startup / General), but when I use xscreensaver, when resuming from suspend the screen is often visible for a brief period before xscreensaver kicks in. I have not seen this problem when using light-locker. I also tried briefly with xfce4-screensaver and did not see the problem, but I have not done extensive testing with xfce4-screensaver.
This is obviously a serious problem: I see that this has been a commonly reported Xfce issue, with various distros / screensavers, etc., over the years, e.g.: https://bugs.mageia.org/show_bug.cgi?id=28286 https://bugzilla.xfce.org/show_bug.cgi?id=14782 https://bugzilla.xfce.org/show_bug.cgi?id=15929 https://askubuntu.com/questions/1383379/xubuntu-desktop-visible-after-suspend-before-lock-screen but I can't make out whether I have misconfigured something here, or whether this is a serious security bug in the current Xfce4 - xscreensaver integration. Celejar