5 years ago
You can submit ideas for the MDM developers here: https://github.com/linuxmint/mdm/issues
i would rather like to see the default on screen keyboard replaced by onboard.
First this is more of a support issue and you will get faster help in the Forums.
Maybe you should try to use LightDM with mint?
Having said all that I think it would be a nice addition to MDM but I suspect it will not get high priority.