Linux Mint 17.1, Native screen+VGA+HDMI

[Ralf Mardorf]

Hi,

since you are not using an official Ubuntu flavour, you at least should
mention on what release of Ubuntu the distro Linux Mint 17.1 is based
on.

Regarding a research "Linux Mint 17.1 is based on Ubuntu 14.04."
- https://www.linuxmint.com/rel_rebecca_cinnamon.php

Are you using Cinnamon?
Regarding https://www.linuxmint.com/documentation.php there seem to be
different editions available.

Have you noticed

"For more information and guidelines please see
the FAQ - https://wiki.ubuntu.com/UbuntuUsersListFAQ"

at https://lists.ubuntu.com/mailman/listinfo/ubuntu-users ?

"What is this list for?

ubuntu-users is a mailing list staffed by volunteer community members
to provide technical support to Ubuntu Users.

Users of Ubuntu and officially supported derivatives (Kubuntu,
Edubuntu, Xubuntu, Lubuntu) can get support here. Users of derivatives
(such as Backtrack and Linux Mint) are not officially supported."
- https://wiki.ubuntu.com/UbuntuUsersListFAQ#FAQ1

Have you tested, if it works when using Ubuntu or an official Ubuntu
flavour, https://www.ubuntu.com/download/ubuntu-flavours ?

Regards,
Ralf