External G-sync monitor FPS drops to 0 /freeze/stutter temporary fix

Discussion in 'Sager and Clevo' started by qwerty0025, May 24, 2017.

  1. qwerty0025

    qwerty0025 Notebook Guru

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    Hi guys

    I'm not sure if this is posted here , but I thought I would do so. I personally battled with this problem yesterday for 9 hours.

    I just bought yesterday a new Asus Swift PG248Q 144hz monitor with g-sync. I own an Clevo p870KM1-g Laptop with 1080 gtx and 75hz g-sync screen, to which the external monitor is attached to.

    There was massive stuttering/fps drops/freezes which the external monitor is causing me when the g-sync is on. I think this has been a problem for a long time when combining different refreshrates screens together.

    There is a temporary solutions for it. We have found out that the fault was are nvidia drivers and the creators update drivers to be specific (big surprise there :p ). If you're experiencing these symptoms roll back to drivers 378.91 to get rid of the problem. Those drivers are all the way from March!. All drivers above 381 (which I believe are the creators update drivers) will lag and stutter and freeze using a g-sync external monitor with your laptop. Also this issue has been sighted when using dual monitor setup with desktops. One being g-sync and other not.

    I thought I'd share it with others struggling with this, because I sure was.

    some talk about this:

    https://eu.alienwarearena.com/ucf/s...ernal-g-sync-monitor?replyPage=1#post-2694405

    https://forums.geforce.com/default/...sus-swift-pg248q-different-refresh-rates-fix/

    http://www.mmo-champion.com/threads...or-Setup-(Questions-and-Concerns)-Please-Help!

    https://www.reddit.com/r/buildapc/comments/6b6c35/terrible_stuttering_problems_with_a_new_build/

    If anyone has found a permanent fix for this, let us know :)
     
  2. John@OBSIDIAN-PC

    John@OBSIDIAN-PC Company Representative

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    Oh my god... why is NVIDIA so ... well, you know... NVIDIA...
    Congrats on your finding, i been searching for this since yesterday without arriving to any conclusion.
    I also ordered a external monitor to do some research!
     
  3. Prostar Computer

    Prostar Computer Company Representative

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    Thanks! We haven't had any inquiries about this (yet), but this is good to know.
     
  4. qwerty0025

    qwerty0025 Notebook Guru

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    I don't think it very common. It is such a specific issue considering that it only occurs when the desktop is in extended mode. When cloned with the laptop's monitor it works just fine. When cloned they share the same refresh rate and I think that's the reason why it works. Maybe :) .

    Comment from the NVidia forum:

    "I doubt NVIDIA even acknowledged this issue so far, and thus it's impossible to tell if it is something intended by WDDM 2.2 (that the 381+ drivers support) and thus might be a Windows issue, or something else gone wrong."

    At least I can play now with smooth g-sync 144hz with my triple screen setup. ^_^
     
  5. Glzmo

    Glzmo Notebook Deity

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    It's likely an issue with WDDM 2.2 itself and/or WDDM 2.2 Nvidia drivers. For example, you also can't effectively turn off GSync on a per-application level with them if you have it on globally, HDR and 10-bit color issues on non-UHD displays, color profile issues,etc. among other things with WDDM 2.2 versions of Nvidia drivers (keep in mind that many of the non-vendor specific problems also apply to AMD WDDM 2.2 drivers, which indicates it may be a general WDDM 2.2 issue).

    WDDM 2.2 was introduced with Windows 10 1703 ("Creator's Update"). Keep in mind that WDDM 2.2 is still immature. WDDM 2.1, introduced with Windows 10 Anniversary Edition, also had several problems for months (such as several D3D9 titles no longer working) until a Windows Update fixed issues. It's too bad one can't force WDDM 2.1 versions of newer drivers to install if the OS supports WDDM 2.2.
     
    Last edited: May 25, 2017
  6. Stress Tech

    Stress Tech Notebook Consultant

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    Thank you very much for this fix. It has worked on my external Acer XB271HUA G-sync monitor and I have no FPS drops anymore. You said you have a triple monitor setup; Are all of the 3 monitors G-sync? if so, in what way did you plug in all of the 3 monitors to get them G-sync all at the same time? Is it another laptop or device you have?

    You see, I have the P870KM1-G laptop and I want a 1440P triple screen setup of the Acer XB271HUA G-sync monitors. Is there a way to plug all the 3 monitors via DisplayPort? I have bought a "mini DisplayPort to dual DisplayPort adapter". I was thinking to put my 2x DDI on my BIOS to my mini DisplayPort's instead of my Thunderbolt 3 ports, making me have more digital display bandwidth through the mini DisplayPort's. Then plug 1 monitor (centre) to the laptops mini DisplayPort and the other 2 monitors to the "mini DisplayPort to dual DisplayPort adapter". Would this work? I got a feeling it will work but my laptop screen will be off, which I will not be bothered about if I get the triple screen setup of the Acer XB271HUA G-sync monitors working.

    I know that there is a mini DisplayPort to triple DisplayPort adapters; but I'm thinking that because that the monitors are 1440P they might need more bandwidth to get the max refresh rates, that's why I have gone for the "mini DisplayPort to dual DisplayPort adapter". I know that this will definitely give me 2x 1440P at 85Hz while my 3rd centre monitor will be plugged in to the laptops mini DisplayPort giving me 1440P at 165Hz.

    Sorry for the long explanation, but its got my head spinning! I don't want to go and buy another two Acer XB271HUA G-sync monitors only to have 2 of them in the mini Displayports and the other one connected to the HDMI port. As you probably know that HDMI does not support G-sync.
    It will be great if anyone can provide me an answer to this...
    Kind regards
     
  7. qwerty0025

    qwerty0025 Notebook Guru

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    Hi , sorry to say I'm no external monitor expert so your guess is good as mine. If you have a friend, who has a g-sync monitor you should test your theory first before buying the third one. I don't think there's a way to get all of them to g-sync without changing which one of them is the main from the drivers.

    As for my setup I calculated the laptops monitor to my three screen setup when I said that :) , So I have the Asus g-sync in display port, one older asus without gsync in the other display port and the laptops monitor. Even like this you can't have g-sync on at the laptop screen and the asus screen at the same time.

    Sorry I can't help you .
     
  8. Stress Tech

    Stress Tech Notebook Consultant

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    No worries. Thank you for your thoughts though. The more information I get the better! the more the merrier as they say :) I may just have to gamble and buy another two Acer XB271HUA G-sync monitors and then experiment on them to see if some how I can get them all on G-sync via 3 DisplayPort interfaces. I will also buy a "1.3 mini DisplayPort to triple DispalyPort adapter" then I can experiment with that and the "1.2 mini DisplayPort to dual DisplayPort adapter" which I already have. If this works or does not work? either way... Then I will post the results with screenshots on the P870KM1 forum for other enthusiasts.

    If the G-sync dream does not work then I will settle with 1x Acer XB271HUA G-sync monitor via mini DisplayPort as my centre screen and the other two Acer XB271HUA (G-sync disabled) monitors on each side of the centre screen via HDMI. So in theory I can not lose if I buy 3x Acer XB271HUA G-sync monitor's.
    I will keep you up to date buddy! see you all soon.
     
  9. Glzmo

    Glzmo Notebook Deity

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    I haven't tried as I don't have three display port screens available, but in theory you might be able to use one of the Thunderbolt ports for the third DisplayPort screen with the appropriate cable/adapter. Not sure if it truly works, though.
     
    Last edited: May 30, 2017
    Stress Tech likes this.
  10. Stress Tech

    Stress Tech Notebook Consultant

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    This is what I'm thinking too. You see there is 2x DDI (digital display interfaces) that can be switched via the BIOS between the Thunderbolt 3 ports and the mini DispalyPorts on the P870KM1. I were thinking that it is best to put one DDI through one mini DisplayPort and attaching a "mini DisplayPort to dual DisplayPort MST adapter" to that mini DisplayPort for the two side monitors to work; hopefully this will split the DDI going into the "mini DisplayPort dual MST adapter" to the two side monitors, but limiting me only 1440P@85Hz each (if I have worked it out correctly). Then my 3rd centre monitor; I will have to try and run it through one of the Thunderbolt 3 ports after I have enabled my 2nd and last DDI to one of the Thunderbolt 3 ports. Because there will only be one monitor plugged in to one of the Thunderbolt 3 ports using only 1 DDI, I will receive 1440P@165Hz for that one monitor. So it be something like this:

    1 DDI to mini DisplayPort/s:
    Left Acer XB271HUA G-sync enabled monitor 1440P@85Hz via "mini DisplayPort to dual DisplayPort MST adapter"
    Right Acer XB271HUA G-sync enabled monitor 1440P@85Hz via "mini DisplayPort to dual DisplayPort MST adapter"

    1 DDI to Thunderbolt 3 port/s:
    Centre Acer XB271HUA G-sync enabled monitor 1440P@165Hz via one Thunderbolt 3 port.

    Just to clarify! just in case anyone is new here and is reading this problem that; This (above) has NOT been tested yet! so I don't know if this will work are not. This is just a theory. But this seems to be the only way I think a P870KM1 user can be able to have a triple G-sync screen setup. One guy I know thinks this will work, but the laptop display will go off or be a duplicate of one screen. He also reckons that the HDMI 2.0 port on the back of the P870KM1 will be disable its self... Someone really needs to test this :) I am looking for my third screen now, as I have just purchased my 2nd Acer XB271HUA last night. Working solution or not?; I will post my results here and on the P870KM1 owners thread too. If anyone has tried 3X DisplayPort monitors on a Clevo laptop, then please share.
    Kind regards
     
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