kwin 6.7.2 hace find_package(Canberra REQUIRED) (línea 235) para el plugin systembell (campana de
audio). libcanberra = stack de audio alsa/pulse/vorbis (pesado, no soberano). Este patch vuelve
Canberra OPCIONAL y hace condicional el subdir systembell (sólo si Canberra_FOUND). kwin construye
sin la campana de audio (deuda audio diferida, misma que knotifications).

diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -232,7 +232,7 @@

 endif()

-find_package(Canberra REQUIRED)
+find_package(Canberra)

 if (KWIN_BUILD_X11)
     pkg_check_modules(XKBX11 IMPORTED_TARGET xkbcommon-x11 REQUIRED)
diff --git a/src/plugins/CMakeLists.txt b/src/plugins/CMakeLists.txt
--- a/src/plugins/CMakeLists.txt
+++ b/src/plugins/CMakeLists.txt
@@ -104,6 +104,8 @@
 add_subdirectory(stickykeys)
 add_subdirectory(synchronizeskipswitcher)
-add_subdirectory(systembell)
+if (Canberra_FOUND)
+    add_subdirectory(systembell)
+endif()
 add_subdirectory(thumbnailaside)
 add_subdirectory(tileseditor)
 add_subdirectory(touchpadshortcuts)