I found this workaround in update-manager, which effectively hides the close button under compiz:
gtkwindow.window.set_functions(gtk.gdk.FUNC_MOVE) -- set_deletable(False) does not work on gtk windows with compiz enabled https://bugs.launchpad.net/bugs/240794 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs