Laptop screen issue

Discussion in 'Hardware Components and Aftermarket Upgrades' started by Mr Matt, Apr 3, 2020.

  1. Mr Matt

    Mr Matt Notebook Enthusiast

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    I have a Clevo P650RA laptop with an intermittent serious screen issue.

    I upgraded a broken 60Hz screen with a 144hz screen last July, and the issue I have was present then and I mentioned it in a post at the time (http://forum.notebookreview.com/threads/clevo-bios-update.829799). I have an Intel 530HD GPU and a discrete NVidia 980M GPU and using Win10.

    The issue is that sometimes when maximising a window, or opening a certain webpage, or sometimes moving my laptop or adjusting the screen position, the screen does something like this;



    Usually you can see the desktop at first but it looks like the VSync is completely wrong, and the it gets so much worse that you cannot make out any of the windows or icons on the desktop, like the frequency sync is getting faster..

    I've lived with it and I can usually get around the issue when it happens; sometimes pressing the "minimise to destop" button in the bottom right will refresh the screen and clear the issue, sometimes CTRL+Alt+DEL will clear the issue, and most often just restarting Windows will clear the issue. At the most extreme I can clear the issue by connecting a TV to the 2nd display connection and change the resolution or Hz of Display 1.

    The issue does not show in the BIOS info screen or when Windows loads to the login screen, if it's going to happen on start up then it will start after I enter my login password and Desktop boots.


    I have never been able to get to the cause of this problem or fix it, but currently I'm stuck with the issue and no way of clearing it. Right now I can only use the laptop screen Display 1 by connecting the 2nd display to a TV and selecting "Duplicate Displays" which clears the issue on Display 1 iimediately (I assume because it's using the NVidia GPU for Display 1 at that time?). If I select "PC screen only" or "Extend displays" then the laptop screen has this issue now.

    I believe it is likely a Windows issue when using the Intel 530HD GPU, and it may be something to do with the frequency or resolution. Is there a way to force the NVidia GPU to be used for everything and ignore the Intel GPU?

    Or could it be something else causing this? I don't think it is a faulty EDP cable from the laptop to the screen as I cannot force this issue or fix it by manipulating that cable or connector. It seems to be software driven seeing as I can clear the issue just by restarting Windows usually.

    I'm well aware that it's likely a faulty or conflicting monitor or a faulty Intel GPU, but if I can force the NVidia to be the primary GPU then I believe this issue won't happen. It has never happened when playing any game using the NVidia GPU, I played a game today for hours this afternoon and this issue only started later when I was browsing the internet.

    Thanks, especially if you can figure out this problem. :)
     
  2. Mr Matt

    Mr Matt Notebook Enthusiast

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    Well, I'm hoping that someone can explain this.

    My screen was flickering no matter what I did to try and clear it for an hour so I removed the laptop battery and powered the laptop only by the mains and the flickering screen issue was fixed on first boot.

    So how is my battery linked to Windows to affect the screen settings/drivers/anything?
     
    Last edited: Apr 3, 2020
  3. tilleroftheearth

    tilleroftheearth Wisdom listens quietly...

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    I know! I know! It powers it up! :p
     
  4. Mr Matt

    Mr Matt Notebook Enthusiast

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    So the battery is still disconnected and the screen had that same issue just now while I was watching a YouTube video. I put the laptop to sleep, woke it up and the issue had cleared.

    I've used my laptop all day and it had been turned on for nearly 24 hours before this happened.

    Anyone got any clue why this is happening?

    (Is this the correction section of this forum to ask for this help? If not can a mod move it to the correct section please.)
     
  5. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    Interesting issue. Probably has something to do with the Intel integrated graphics driver or a corrupted Registry. Have you tried disabling the Intel HD Graphics in Device Manager so Windows cannot use it? Force using only NVIDIA GPU?

    You could try deleting all of the display related Registry keys in CurrentControlSet and rebooting to force Windows to recreate them. Windows may be trying to use the EDID stored in the Registry from the 60Hz panel.

    Have you tried a clean install of Windows? That might be the easiest solution rather than wasting time trying to find and fix the issue.

    It definitely sounds like a software issue. If an OS reinstall does not fix it then it may be hardware related.
     
    Last edited: Apr 4, 2020
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  6. Mr Matt

    Mr Matt Notebook Enthusiast

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    Thanks, I'll try this tomorrow. Which registry directory is the control set for the display you mentioned?

    If I disable the Intel GPU in Device Manager will everything just automatically use the nVidia? I don't want to turn off the Intel GPU and not be able to see and use Windows to enable it again if it doesn't use the nVidia.

    I haven't tried a clean install of Windows yet and I'm currently in isolation and don't want to put my laptop into a state I cannot recover from without decent internet, so I'm going about this slowly. :)


    After living with this issue for a long time, I'd say it's either a faulty;

    Monitor (possible as this issue started the day I installed the new monitor, bought from eBay.com and shipped to UK)

    Corrupt Windows (possible because a simple sleep and wake will clear the issue)

    Intel GPU or a conflict with this 144Hz monitor in any frequency or resolution (possible as I never get the issue when using the nVidia, I play games all day and never once since the beginning has this happened on the nVidia)

    EDP cable (possible but unlikely as I cannot force the issue manually)


    One thing to note is a couple of times I have had that screen flicker when the issue happened in Window and I restarting the laptop and went into the BIOS setup screen. I don't know if that eliminates a corrupt Windows as the sole suspect(?).

    If I knew it was definitely the monitor then I would buy a new 60Hz monitor and be done with this issue. What I don't want to happen is to find this issue pops up on a new monitor.

    Thanks for the advice so far.
     
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  7. Mr Matt

    Mr Matt Notebook Enthusiast

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    Incidentally, when I emailed the company that sold me the monitor they said that a BIOS update should clear the issue.

    I have never been able to find the updated BIOS file and nobody from Clevo or PC Specialist has ever answered me about it either.
     
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  8. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    You should find "monitor" information under:
    \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers

    Should be able to delete InternalMonEdid and MonitorDataStore keys. You may find both old and new laptop displays listed there, along with any external monitors or TV sets you connected in the past.
     
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  9. Mr Matt

    Mr Matt Notebook Enthusiast

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    I have only this;

    upload_2020-4-6_1-30-16.png
     
  10. Mr Matt

    Mr Matt Notebook Enthusiast

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    I found this root with several configs in it. My newer display is the BOE

    upload_2020-4-6_1-46-30.png
     
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