Have a three screen setup now:

1) Laptop screen primary gets User ID password on boot. After boot chrome 
windows which were on screen 2 are restored here along with this screens chrome 
windows.
2) HDMI nVvidia hardwired TV, steals focus on resume to password.
3) Thunderbolt 3 USB-C HDMI TV which occasionally doesn't get signal when 
rebooted and has to be powered off and on.

Other notes when booting all three monitors turn on and off a few times.
There is one patch applied during boot to enable nVidia HDMI sound:

    setpci -vD -s 01:00.0 0x488.l=0xffffffff:0xffffffff
    sh -c 'echo 1 > /sys/bus/pci/devices/0000:01:00.0/remove'
    sh -c 'echo 1 > /sys/bus/pci/devices/0000:00:01.0/rescan'
    systemctl restart lightdm.service

Ubuntu 16.04.3, Kernel 4.14.4, Skylake 6700HQ, nVidia GTX 970M, Samsung
Pro 960 NVMe SSD.

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https://bugs.launchpad.net/bugs/1409166

Title:
  Popup dialog "could not set the configuration for CRTC 65" steals
  keyboard, hinders login in 3-monitor configuration

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