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I filled up that recommended table for you:
Category
Questions
Answers (N/A if not applicable)
Description
Provide a detailed description of the issue
Lagging whenever iGPU switches to dGPU or dGPU switches to iGPU.
Unneccessary switching. (read as: ways more then normal)
Does it fail every single time, or only sometimes?
If you can offer a % rate please do.
If you follow my steps to reproduce it fails 100% of the time
Hardware (HW)
Brand and Model of the system.
XMG
Hybrid or switchable graphics system?
ie Does it have AMD or NV graphics too?
Optimus
Make and model of any Displays that are used to see the issue (see note2 below).
LFP = Local Flat Panel (Laptop panel)EFP = External Flat Panel (Monitor you plug in)
LFP
How much memory [RAM] in the system (see note2 below).
16 GiB
Provide any other hardware needed to replicate the issue.
ie: Cables&brand, cable type [vga, hdmi, DP, etc], dock, dongles/adapters, etc
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Hello, RadonGOG:
Thank you for the information provided.
I would like to gather some other information from your system.
-Please access: https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility Download Intel® System Support Utility
-Download the SSU.exe and scan your system.
-Then save the report and attach the .xml file in your answer.
Regards,
Esteban C
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Would like to do so, but although run with admin rights the utility return me this error screen:
Same in happens when in safemode. Didn´t find any report in FAQ that would adress this issue, no older versions of the utility are availible and so on...
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Hello, RadonGOG:
I understand, the please provide me with your dxdiag and msinfo32 reports.
dxdiag report:
1. Press Windows key + "R".
2. Type "dxdiag" and hit enter or click ok.
3. Save the report where it says "Save all the information".
msinfo32 report:
Same as dxdiag but when saving it go to file and then save.
Please attach both files in your answer.
Regards,
Esteban C
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Hello, RadonGOG:
Thank you for providing the information needed for this.
I will be doing the tests on my end, once done, I will be advising you with the outcome.
If you require any further information or support, feel free to contact us.
Regards,
Esteban C
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So, in the meanwhile you published a new driver and nvidia did one as well. I thought it wouldn´t hurt to give you some new information:
Latest Intel: 10.18.10.4358
Latest Nvidia: 10.18.13.6175 (also known as 361.75)
Bug is still present. But hey, now you´ve also got DxDiag and msinfo from a system that currently got the bug!
Well, I hope it helps. I´m switching back to Nvidia 350.12 via DisplayDriverUninstaller now; guess it´ll work again then. But it´s still not cool beeing forced to use such an old GraphicsCardDriver!
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Hello, RadonGOG:
Thank you for the update on this information.
I will be performing the tests as soon as possible to provide you with my outcome.
Regards,
Esteban C
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Hello:
I am still working on these tests, I apologize for the delay.
As soon as I get an outcome, for sure I will let you know.
Regards,
Esteban C.
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This problem is not limited to Intel HD 4000 and below. I have an Intel HD4600 with a Nvidia GTX 970m and have the same problem with Windows 10. Windows 8 worked perfect, but Windows 10 has constant switching with lags during Windows user interface events (wallpaper switching, bringing up the action center, even the notification for CD or USB drive. All you need to do to make it manually happen is right click on the desktop and select "Next desktop background" and it will switch to the dedicated video card, just for a second. I don't believe the issue has to do with WDDM incompatibilities as the original poster speculates because the 4600 is 2.0, isn't it? I also know I'm not the only user with the 4600 and this problem. Let me know if you want any logs or whatever.
[Post edited to include some of the triggers.]
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Wow, did this got linked somewhere or so? Anyways, I´m very surprised to see folks around that run Haswell-based systems facing the same problems...
...this of course crushes my WDDM1.3 & WDDM2.0-Combi-Theory!
testrun: Well, there are several methods to get a guaranteed buglag. I just thought the manual wallpaper change-method would be the easiest one to reproduce.
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RadonGOG:
I found your thread yesterday and since it was fairly recent I replied and posted the link over at the Nvidia forums (the same thread you linked to in your first post). I'm hoping to get Intel's attention to see if they will fix it. This bug has been here since Windows 10 came out and is quickly getting old.
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EstebanC_Intel
This is the problem: When the Windows 10 user interface has to do something GPU wise (wallpaper switching, opening the action center, many more), it switches from Intel to NVIDIA for only a second then back to Intel. In Windows 8, the Intel GPU was capable of these effects. All this switching causes lags. This problem effects anyone with a HD4600 and older ones including the HD4000 that we know of.
Also to add: I have the latest beta drivers available from Intel and the latest Nvidia drivers. It's still not working.
Can you look into it? Do you need more info?
Thanks.
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Hi, Same problem with MSI GS70 Stealth. Windows 10 Home x64
Nvidia 765M and Intel HD 4600
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Same problem here. Windows 10 Pro x64, Intel HD 4600 and Nvidia 780M
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Same problem here. Windows 10 Enterprise x64, Intel HD4600 and nVidia GTX 870M: https://msi.com/Notebook/GS60-2PE-Ghost-Pro.html# hero-overview GS60 2PE Ghost Pro | MSI Global | Notebook - The best gaming notebook provider
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same problem here as well.
for me, it lags when the wallpaper is switched automatically, doesnt necessarily have to click & change it.
clicking on power/ battery icon on the taskbar notification area.
plugging in & removal of an USB diskdrive (has to be a drive, an input device like a gamepad, a keyboard or a mouse wont trigger it)
clicking on "System" on the Settings panel from the Start menu.
opening IE.
triggers the lag. everytime.
Gigabyte P2742 (based on Clevo W370ET)
Intel Core i7-3630QM
8GB RAM
HD Graphics 4000
GTX 660M
Windows 10 Pro 64bit - Version 1511
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I started a thread about this bug here on 17 december 2015.
It is exaclty the same problem, on exaclty the same machines
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Same here.
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Same random gpu switching optimus bug with 4600 and GTX780M - longest running unresolved problem I can recall within the windows os
Intel, Microsoft, Nvidia, and my laptops manufacturer, Sager are all pointing at each other to fix it.
I'm truly not interested in the blame game, I would just like this ongoing problem resolved.
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