#2351 don't enable dbus mixin for clients that have no methods to exp…

…ose via dbus

git-svn-id: https://xpra.org/svn/Xpra/trunk@25164 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/server/source/dbus_mixin.py

@@ -5,13 +5,20 @@
 # later version. See the file COPYING for details.
 
 from xpra.server.source.stub_source_mixin import StubSourceMixin
+from xpra.util import typedict
 
 
 """
 Expose the ClientConnection using a dbus service
 """
 class DBUS_Mixin(StubSourceMixin):
 
+    @classmethod
+    def is_needed(cls, caps : typedict) -> bool:
+        #the DBUSSource we create is only useful if the client
+        #supports one of the mixins it exposes:
+        return caps.boolget("windows", False) or caps.boolget("sound", False)
+
     def __init__(self):
         self.dbus_control = False
         self.dbus_server = None