It's not about disconnecting from the external display (the OSK won't be shown then if a BT keyboard is present), but rather picking the device up and using its virtual touch pad feature.
Conversely, bug #1521518 discusses the opposite being a problem on the main screen - that there is no way to invoke the OSK when an external keyboard is connected.
It's not about disconnecting from the external display (the OSK won't be shown then if a BT keyboard is present), but rather picking the device up and using its virtual touch pad feature.
Conversely, bug #1521518 discusses the opposite being a problem on the main screen - that there is no way to invoke the OSK when an external keyboard is connected.