Surface Dock keeps waking up external monitor

Anonymous
2016-07-10T11:30:09+00:00

My monitor (LG 29UM68) is connected to Surface Dock -> SP4, via direct miniDisplayPort.

It keeps entering sleep mode and waking up repeatedly, even though my SP4 is asleep. This does not happen when I connect the monitor to SP4 directly.

Another issue is that if I set to PC Screen Only, after few seconds, it will automatically switch back to external monitor only. Again, this does not happen if I connect monitor to SP4 directly.

These 2 issues only arise if I use Surface Dock.

I have gone through all the steps here (https://www.microsoft.com/surface/en-sg/support/hardware-and-drivers/troubleshoot-docking-station-surface-dock) successfully, but issue persist.

Please help.

Surface | Accessories | Surface Dock

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  1. Anonymous
    2017-10-26T15:37:37+00:00

    BTW, Does anyone experience LG monitor random flickering for 1-2 seconds when working with SP4 or Dock?

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  2. Anonymous
    2017-10-26T15:32:57+00:00

    Yes, DP 1.2 turned on.

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  3. Anonymous
    2017-10-26T15:30:57+00:00

    Seems quite a few cases here are related to LG monitors.... just wondering if you guys have turned on DP 1.2?

    Cheers.

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  4. Anonymous
    2017-10-20T06:00:48+00:00

    I read about it.

    That's a workaround, not a solution!

    What are the possible Hz?

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  5. Anonymous
    2017-10-19T22:17:27+00:00

    Same Problem with 

    Monitor: LG 34UM88-P

    miniDP to DP cable

    new Surface Pro: i5 - 8GB

    Did a Surface Dock Update, newest Fall Update + Drivers (Pen Problem still there - but another story) and ran the Surface Software Repair Tool.

    So... where is the problem?

    I have the same monitor. Using a UHD mDP to Hdmi adapter resolved the sleep problem. I know it's a suboptimal setup but the sleep issue was driving me crazy. 

    Used one similar to this and connected the HDMI cable that came with the monitor. 

    https://www.amazon.com/gp/aw/d/B00K0UDJFI/ref=mp\_s\_a\_1\_7?ie=UTF8&qid=1508451515&sr=8-7&pi=AC\_SX236\_SY340\_FMwebp\_QL65&keywords=mdp+to+hdmi&dpPl=1&dpID=41K6DJnsTiL&ref=plSrch

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