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Displays Monitor resolution limited - why?

Discussion in 'Hardware' started by earlydoors, 5 Jan 2019.

  1. earlydoors

    earlydoors Minimodder

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    Dell U715H (2560x1440)
    Surface Pro (2017 core m3, 4GB RAM, Intel HD Graphics 615)
    Connecting cable is: HDMI into the monitor > HDMI to MiniDP converter > Surface Pro

    Surface pro is running at normal resolution of 2736x1824, but when I connect to the monitor it runs at a max resolution of 2048x1152, some way under the native resolution of the monitor.

    When I use a DP to MiniDP cable, both Surface Pro screen and Monitor run at max, native resolutions.

    So is it something to do with the converter I am using?

    Appreciate any help - thanks
     
  2. yuusou

    yuusou Multimodder

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    Your monitor probably only supports it's maximum resolution through DisplayPort.
     
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  3. Anfield

    Anfield Multimodder

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    Have you tried what happens if you connect the Surface with one simple cable to the monitor instead of using adapters?
    That would greatly narrow down the list of things that could potentially be causing the problem.
     
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  4. Zoon

    Zoon Hunting Wabbits since the 80s

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    This ^

    Either your laptop, or your screen, or the adapter, or more than one of these, is limited to HDMI 1.2 - I have the same issue on my 2560x1600 screen which will only do 1920x1080 on HDMI and full res is displayport only.
     
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  5. earlydoors

    earlydoors Minimodder

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    Thanks everyone . Appreciate the quick responses.

    Yes it works at full resolution with the 'one simple cable' approach suggested by Anfield.

    Problem is that the monitor only has one DisplayPort input, which is currently being used for my work laptop.

    I was hoping to use the HDMI cable for my SurfacePro so I wouldn't have to switch cables at the back of the monitor each time I wanted to switch devices.
     
  6. Zoon

    Zoon Hunting Wabbits since the 80s

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    I have one of these cables myself and it works fine (although I'm only at 1920x1080p resolution for the device and screen in question) https://www.amazon.co.uk/Rankie-R1101-DisplayPort-Cable-Black/dp/B00YONKZ72/ but if the issue is that either your surface or your monitor won't support the full resolution over HDMI, this cable still won't fix it.

    I have the same as you and I might have to just get a 3-in-1 displayport switcher.
     
  7. wolfticket

    wolfticket Downwind from the bloodhounds

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    I doubt it's the monitor and this suggests (albeit not totally definitively) that the Surface should support the resolution: https://support.microsoft.com/ml-in/help/4039635/connect-surface-to-a-tv-display-or-projector

    My guess would be the adapter and this seems to back that up: https://support.microsoft.com/ml-in/help/4039635/connect-surface-to-a-tv-display-or-projector

    I would try a DisplayPort/MiniDP to HDMI that:
    - States that it is "active"
    - States it supports high enough resolutions
    - Has good reviews

    This is what a quick amazon search bought up: https://www.amazon.co.uk/s/ref=nb_s...+active&rh=i:aps,k:displayport+to+hdmi+active

    EDIT: ...I suppose another option would be using DisplayPort to HDMI to connect your work laptop?
     
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  8. earlydoors

    earlydoors Minimodder

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    Thanks so much, will give this a go. Really helpful.
     
  9. thewelshbrummie

    thewelshbrummie Minimodder

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    I bought one of these for my HP Spectre x360 laptop to output 4K @60hz in October 2016:

    https://www.amazon.co.uk/gp/product/B00S0BWR2K/

    MiniDP jack to HDMI socket. Worked perfectly. Despite my laptop having an HDMI socket, Skylake CPUs don't support 4K @60hz via HDMI, only via miniDP so the adapter was required. Since the surface Pro uses miniDP as well it should do the job perfectly.

    From memory there are active and passive adapters - this one is active (which is why it's £17 not £7) but my understanding is that passive adapters may not work.

    Edit: just re-read the rest of the thread. The HDMI version support of your monitor matters, as does the GPU in the Surface but note that 1440p@60hz doesn't require HDMI version 2.0 (the 1.3 standard is good enough for 1440p60hz, HDMI version 2.0 is required for 4K60hz). Also, a quick search on the U2715H came up with a Dell forum page with someone using a Mac with the same issue: https://www.dell.com/community/Monitors/U2715H-2560x1440-resolution-over-HDMI/td-p/4558431

    I can't find the spec for your monitor but I can't think of a single display from the last decade that doesn't support at least HDMI 1.3 so should be fine - there's just something odd going on with the adapters or GPU output settings on the Surface.
     
    Last edited: 7 Jan 2019

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