Internal display periodically not coming back on after disconnecting eGPU  

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acee
 acee
(@acee)
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June 10, 2018 9:05 pm  

I've been recently experiencing this issue where I can't get my laptop's integrated graphics (Intel 620 HD) to come back on after disconnecting my eGPU (Aorus Gaming Box GTX 1070) and then letting my computer go to sleep. When waking the laptop up from sleep with no eGPU attached, the laptop will turn on and be responsive (I can see the infrared lights for Windows Hello turn on and then go away when I look at the cameras indicating it recognized me and logged me in), but the display does not turn on. I even tried using Win+P to switch between internal/external displays, but it doesn't do anything. Once even in this state, I connected my eGPU and my external monitor and Windows shows that only one display is attached - the one to the GTX 1070 and nothing connected to my integrated graphics. In the device manager, there is no error associated with the integrated graphics - it just seems like no monitor is attached...

The only way I've been able to get the internal display to come back on is to poweroff the computer (e.g. hold the power button down till it turns off).

Not sure if this is a driver or Windows issue? I didn't have this issue until only recently having upgraded to Windows 10 version 1803.


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FLinesse
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June 14, 2018 1:57 am  

Same here. I disabled my laptop internal display by choosing to display only my external monitor through settings. After powering off and disconnecting my egpu then restarting my laptop, the screen is still disabled although everything else is still functional. I've restarted a couple of times now and even hooking up an external display. Everything works fine but I just can't get my internal display to come back up even by changing the display settings back. Running an HP Spectre x360 also with the Aorus Gaming Box (GTX 1080).


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FLinesse
(@flinesse)
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Joined: 5 months  ago
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June 14, 2018 1:57 am  

Same here. I disabled my laptop internal display by choosing to display only my external monitor through settings. After powering off and disconnecting my egpu then restarting my laptop, the screen is still disabled although everything else is still functional. I've restarted a couple of times now and even hooking up an external display. Everything works fine but I just can't get my internal display to come back up even by changing the display settings back. Running an HP Spectre x360 also with the Aorus Gaming Box (GTX 1080).


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acee
 acee
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Posts: 3
June 18, 2018 7:28 pm  

I still haven't been able to resolve this yet either... I had tried using a more recent version of the Intel and NVIDIA drivers, but I'm still getting seemingly random instances where the internal display won't come back on. The strange thing is that often times, this is when I was using the computer with the eGPU already disconnected: I set the display to internal display only, disconnect the eGPU, then put the laptop to sleep. When it wakes up, the screen doesn't come on anymore until I forcefully power it off.

It didn't used to do this, either before 1803, or a recent BIOS update I did. Unfortunately, I only noticed this happening after I did both, so wasn't able to isolate it to which one it is (maybe it's even a combination of both...)


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acee
 acee
(@acee)
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June 21, 2018 1:17 am  

I don't know if it is related to these issues or not, but I did notice a weird state my laptop got into after being disconnected and used apart from my eGPU without a restart.

The eGPU shows as disconnected (expected), but Windows thinks there is still a second monitor attached somewhere. I can even use it as a secondary display, but of course I have no idea where it goes to.

In Device Manager under "Monitors", there are two monitors listed:

  • Generic Non-PnP Monitor on Microsoft Basic Display Driver
  • Generic PnP Monitor on Intel(R) HD Graphics 620

That Non-PnP Monitor seems to be the ghost monitor. Perhaps in some instances the Intel HD Graphics doesn't come back (once with the eGPU connected, I saw it go into a Code 43 state, if I recall correctly), and the computer just keeps on using that "ghost" monitor.

After rebooting the computer, disconnected from the eGPU in this case, the Non-PnP monitor went away.

I saw this discussion here: https://superuser.com/questions/1142454/device-manager-showing-extra-generic-non-pnp-monitors

It sounds like some issue with the Intel graphics driver, but I am already on the latest one available for my machine and one that I downloaded from Intel didn't want to install.

I'll have to keep an eye on this and see if if I can get an updated driver some how...


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