This feature allows server side applications to send system notifications (aka notifications bubbles) to the client.
It is supported on all platforms and controlled by the notifications
configuration option.
python-notify
or python-dbus
(the exact name of the packages required vary)MS Windows XP:
MacOS 10.10.x:
Gnome-shell:
Please refer to the notifications
subsystem.
-d notify,dbus
xpra control :100 send-notification "hello" "world" "*"
will send the message to all clients.