Insofar as this may be considered a bug instead of a feature, it is a bug in either your window manager, Wine, or Steam. There's nothing xscreensaver can do about it.
https://www.jwz.org/xscreensaver/faq.html#popup-windows -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xscreensaver in Ubuntu. https://bugs.launchpad.net/bugs/1744459 Title: xscreensaver does not provide absolute visual protection Status in xscreensaver package in Ubuntu: New Bug description: I'm using xscreensaver 5.36-1ubuntu1 and xserver-xorg-core 2:1.19.5-0ubuntu2 and while I had Steam (with Wine) opened and a chat window was open but minimized to the taskbar after locking the screen with xscreensaver I did receive a message from somebody which then appeared on the right bottom of xscreensaver's locked window. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xscreensaver/+bug/1744459/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
