You might want to try this,
Go to your BIOS and change it from AUTO to Onboard, connect your monitor to the onboard card, and do
or whatever the command is for your distro
and set it up so that it uses the NVidia card,
set the BIOS to AUTO again and reconnect your monitor to the NVidia card,
and then try it.
That's what I did when installing Kubuntu on a Dell.