U2414H (dual) + GTX770 + DP1.2 MST = Power/Resume Issues

TG2000,

What GTX770 driver version? Do the driver notes state that it supports DP1.2? Have you tested on the computer a single U2414H with DP1.2 turned off to see if it also has Power/Resume Issues?

My Gigabyte GTX 770 driver version 320.49 and its specification support DP1.2a.  This desktop computer used to work well with a single Samsung monitor via DVI cable. I just bought two new U2414H this weekend to replace a Samsung. I will test a single U2414H with DP1.2 disable. will report the result soon.

After multiple repeat testing for single U2414H with DP1.2 disable and unplug DP out cable, I had not found the issue of entering Power Save Mode during PC startup. But in dual U2414H DP1.2 MST mode, I occasionally receive Entering Power Save Mode during PC startup. Since Gigabyte GTX 770 card provides 1DP, 1HDMI, 2xDVI and U2414H provides 1DP, 1DPmini, 2xHDMI, 1 OutDP port, that why I need to setup my connection with MST function.  Currently I solve this issue by turn off/on power cable of both U2414H monitors. (power off/on with power button cannot get the same result). 

Appreciate this community  sharing and advice the common issue.

Thanks you,

Hi TG2000, I had the same problem. My monitors enters in power save mode as soon as windows start up. I solve the problem inverting the connection of the monitors.

So I connected the secondary monitor as the main monitor and enabled the display port 1.2. On the former main monitor I connected the DP cabled and disabled displayport 1.2 configuration. The problem gone.

Based on that I suppose that one of the monitors are defective.

Try that and let us know what happens.

ps. I´m using a XFX AMD 7750 card with latest catalyst drivers.

Hi Marcelo_Cr,

Appreciate your advice.  Based on your procedure, during the process of switch a  primary and secondary monitor, the monitors need to unplug/replug the power cord. I thought this monitor model need to shutdown/reboot the device by unplug/replug the power cord, instead of  push the power off/on button which it is not reset/clean the issue.

Thank you again.

Hi TG2000,

did you tested the new configuration?

I had more funny result from U2414H dual DP1.2 MST connection. Sometime after my PC wake up from Sleep condition, my first U2414H monitor (DP1.2=enable) still in "Entering Power Save mode"  but second U2414H (DP1.2=disable) detect  signal from GTX-770 and operate as single monitor. Finally I need to unplug and reconnect a power electric both of them. (actually I used an extension power cord which have a switch for each port.)

I also have this problem.

I use a Macbook Pro late 2013. And sometimes when I connect my laptop to the U2414H I get following error on the screen that I have connect with DisplayPort:

I also have another U2414H connected through HDMI to the same computer that works without any problem.

I solve the DP-connected-monitor-problem by changing input source and then changing back to DisplayPort.

Is this related to the same type of error as other users have experienced?