Merge pull request #102104 from Hilderin/fix-embedded-game-disappear-when-not-focused

Fix Embedded Game disappear when not focused on KDE 5

Author: Repiteo

platform/linuxbsd/x11/display_server_x11.cpp

@@ -6276,7 +6276,7 @@ DisplayServerX11::WindowID DisplayServerX11::_create_window(WindowMode p_mode, V
 			}
 		}
 
-		if (wd.is_popup || wd.no_focus || wd.embed_parent) {
+		if (wd.is_popup || wd.no_focus || (wd.embed_parent && !kde5_embed_workaround)) {
 			// Set Utility type to disable fade animations.
 			Atom type_atom = XInternAtom(x11_display, "_NET_WM_WINDOW_TYPE_UTILITY", False);
 			Atom wt_atom = XInternAtom(x11_display, "_NET_WM_WINDOW_TYPE", False);
@@ -6422,6 +6422,7 @@ DisplayServerX11::DisplayServerX11(const String &p_rendering_driver, WindowMode
 	KeyMappingX11::initialize();
 
 	xwayland = OS::get_singleton()->get_environment("XDG_SESSION_TYPE").to_lower() == "wayland";
+	kde5_embed_workaround = OS::get_singleton()->get_environment("XDG_CURRENT_DESKTOP").to_lower() == "kde" && OS::get_singleton()->get_environment("KDE_SESSION_VERSION") == "5";
 
 	native_menu = memnew(NativeMenu);
 	context = p_context;

platform/linuxbsd/x11/display_server_x11.h

@@ -338,6 +338,7 @@ class DisplayServerX11 : public DisplayServer {
 	bool xinerama_ext_ok = true;
 	bool xshaped_ext_ok = true;
 	bool xwayland = false;
+	bool kde5_embed_workaround = false; // Workaround embedded game visibility on KDE 5 (GH-102043).
 
 	struct Property {
 		unsigned char *data;