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RE: UP3214Q - no picture after powering off the device / half picture at the login screen

* None of the Dell OEM Intel integrated GPUs support 4K2K

* Nvidia drivers 327.00 and newer support Tiled Display. Here is the latest list of video cards from Nvidia that can support 4K2K =
GeForce GTX TITAN
GeForce GTX 780
GeForce GTX 770
GeForce GTX 760
GeForce GTX 690
GeForce GTX 680
GeForce GTX 670
GeForce GTX 660 Ti
GeForce GTX 660
GeForce GTX 650 Ti BOOST
GeForce GTX 650 Ti
GeForce GTX 650
GeForce GT 640
NVS 510
Quadro series using Kepler architecture
Quadro K500
Quadro K1000
Quadro K2000
Quadro K3000
Quadro K4000
Quadro K5000
Quadro K6000

* AMD driver 13.4 and newer support Tiled Display. Here is the list of video cards from AMD that can support 4K2K =
AMD Radeon HD7970
AMD Radeon HD7750
FirePro W600/W5000/W7000/W8000/W9000
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We tested the UP3214Q on an Alienware Aurora with the Nvidia GTX Titan video card, driver version 331.65, Windows 7 Ultimate.

We set the UP3214Q to DP1.1 and power cycled the UP3214Q on/off/on ten times with no issues.
We then restarted the Alienware Aurora ten times. We always saw the Dell post screen and the windows logon screen. We never saw the 1/2 screen issue.

We set the UP3214Q to DP1.2 and power cycled the UP3214Q on/off/on ten times with no issues.
We then turned the Alienware Aurora off, then on ten times. We always saw the Dell post screen and the windows logon screen. We never saw the 1/2 screen issue.

I found this in my searching. So these issues on non-Dell hardware show that the monitor may not be the culprit in all cases.
http://www.pugetsystems.com/labs/articles/4K-Monitor-Requirements-and-Usage-492/

1. When using DisplayPort in MST mode, NVIDIA cards fail to POST about 50% of the time. When this happens, you have to hit the reboot button on the computer (power off then back on does not work) in order to POST successfully. PC Perspective also had this issue and reported it as an issue with the STMicro firmware on ASUS motherboards.
2. Nvidia and Intel displays in MST mode cannot see the BIOS or POST screens on our ASUS Sabertooth Z87 motherboard. DisplayPort in SST mode and single HDMI, however, work fine. This issue does not happen with AMD video cards.
3. Also related to DisplayPort in MST mode, before the NVIDIA driver is installed you only get a black screen when the OS boots. You have to switch to SST mode, install the NVIDIA driver, then switch back to MST mode.
4. Finally, we initially had some problems when testing HDMI that ended up being due to the cable not being HDMI 1.4a compliant.

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