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3 dell u2515h monitors daisy chain problem

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reallukx
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2017/03/23 06:31:01 (permalink)
I have Geforce 770 GTX. I'm trying to connect 3 dells U2515h using daisy chain.
I'm connecting 1 monitor using mini dp to graphic card (DP port). than 2 monitor also with mini dp to DP in first monitor. 3 monitor mini dp to DP in second one. 
The problem I'm having is that 3rd monitor has always lower resolution (2048x1152) instead of 2560x1440 liek monitor 1 and 2 has.
When I connect 3rd monitor using separate cable hdmi to hdmi graphic card port all 3 than have full resolution. 
I'm not sure if it's my graphic card fault or it's some bug with mini dp daisy chaining ?
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    bcavnaugh
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    Re: 3 dell u2515h monitors daisy chain problem 2017/03/23 12:11:11 (permalink)
    Welcome to the Forum reallukx
    Have you reviewed this on the Dell Support Site?
    You can only chain from Out DP to In DP on your monitor and the Input on the First Monitor Must be in the In DP Port.
    Manual Pages 25-27
     
    NOTE:
    U2515H/U2515HX supports the DP MST feature. To make use of this feature, your PC Graphics Card must be certified to DP1.2 with MST option.
    The default out of factory setting in the U2515H/U2515HX is DP1.1a.
    To enable MST connection, please use only DP cable as provided in box (or other DP1.2 certified cable) and change the DP setting to DP1.2 by performing the below steps:
    post edited by bcavnaugh - 2017/03/23 12:18:45

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    Cool GTX
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    Re: 3 dell u2515h monitors daisy chain problem 2017/03/23 12:40:00 (permalink)
    nice find bcavnaugh

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    wmmills
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    Re: 3 dell u2515h monitors daisy chain problem 2017/03/23 16:40:30 (permalink)
    bcavnaugh
    Welcome to the Forum reallukx
    Have you reviewed this on the Dell Support Site?
    You can only chain from Out DP to In DP on your monitor and the Input on the First Monitor Must be in the In DP Port.
    Manual Pages 25-27
     
    NOTE:
    U2515H/U2515HX supports the DP MST feature. To make use of this feature, your PC Graphics Card must be certified to DP1.2 with MST option.
    The default out of factory setting in the U2515H/U2515HX is DP1.1a.
    To enable MST connection, please use only DP cable as provided in box (or other DP1.2 certified cable) and change the DP setting to DP1.2 by performing the below steps:


    +1.....Nice catch there Cav. :)

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    #4
    reallukx
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    Re: 3 dell u2515h monitors daisy chain problem 2017/03/23 20:46:23 (permalink)
    Yes I contacted Dell and they said it's graphic card limitation. I have set DP 1.2 on all monitors and still there the last monitor is always lower res. So far only it work only works when it's connected to HDMI geforce port. I bought DP -> DP cable instead of DP -> miniDP and will test it also. Too bad I can't test 1080 card if it work okay :)
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    Cool GTX
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    Re: 3 dell u2515h monitors daisy chain problem 2017/03/23 21:02:23 (permalink)
    reallukx
    Yes I contacted Dell and they said it's graphic card limitation. I have set DP 1.2 on all monitors and still there the last monitor is always lower res. So far only it work only works when it's connected to HDMI geforce port. I bought DP -> DP cable instead of DP -> miniDP and will test it also. Too bad I can't test 1080 card if it work okay :)


    Need three cables according to Nvidia
     
    Nvidia SURROUND 
      

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    bcavnaugh
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    Re: 3 dell u2515h monitors daisy chain problem 2017/03/23 22:24:22 (permalink)
    @ reallukx are you running NVIDIA SURROUND or Dell's DP MST Feature (daisy chain)?
     
    DisplayPort output for MST (Multi-Stream Transport) capable monitor. DP 1.1 monitor can only be connected as the last monitor in the MST chain. To enable MST, refer to instruction on section "Connecting the monitor for DP Multi-Stream Transport (MST) function".
     
     
    post edited by bcavnaugh - 2017/03/23 22:31:44

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    Cool GTX
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    Re: 3 dell u2515h monitors daisy chain problem 2017/04/05 07:10:15 (permalink)
    reallukx  any update on this ?
     
     

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    Poofu1
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    Re: 3 dell u2515h monitors daisy chain problem 2017/04/27 17:23:27 (permalink)
    im pretty sure you can only daisy chain with thunderbolt 
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    bcavnaugh
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    Re: 3 dell u2515h monitors daisy chain problem 2017/04/27 17:32:29 (permalink)
    Poofu1
    im pretty sure you can only daisy chain with thunderbolt 


    Dell (Multi-Stream Transport) or MST has nothing to do with thunderbolt.

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