[BUG REPORT] Freezing lag of HD4600 in Win10 with Nvidia Optimus laptop

[AScis1]

System Used: clevo p157SM-A

CPU SKU: i7-4800MQ

GPU SKU: HD4600 OPTIMUS + nvidia GTX 970MProcessor Line: I7 mobile quadSystem BIOS Version: latestCMOS settings: defaultGraphics Driver Version: 20.19.15.4300GOP/VBIOS Version: 5.5.1032Operating System: Windows 10 64 bitOS Version:API: DX11Occurs on non-Intel GPUs?: don't know

I have a Clevo P157SM-A with Optimus (HD4600 + 970M) Windows 10 64bit here, with nvidia 358.50 using mainly on AC power.

dGPU is activating itself when Windows Aero UI request some effects or animations: it happens ( STEPS TO REPRODUCE)

1.(sometimes) clicking on Start button when I have some animated squares2.(always=way to replicate this problem) clicking on BATTERY icon (it pops up power settings with an animation)3.(sometimes) clicking on volume icon (volume bar shows up with an animatio)4. ALWAYS REPLICATES WHEN CLICKING "NEXT WALLPAPER" in desktop with right click if a Windows aero theme is selected.

Activating dGPU for just 1 second or so, in coincidence with UI effects, then dGPU turns off.

IT GENERATES TERRIBLE LAG (I cannot move cursor and system is freezed for 1 second)

When the lag generates, the dgpu led is lighting up for 1 second so it's like turning on dGPU for no reason (integrated graphics can handle these effects EASLY) then turn it off all in one second.

Nvidia gpu activity shows "no program" using it , altough it's active for 1 second.Therefore I haven't managed to track a specific app that causes it.

RC6 RENDER STANDBY Enable or Disabled, doesn't make any difference

This problem has been reported by many users on notebookreview forum and on https://forums.geforce.com/default/topic/860554/geforce-mobile-gpus/windows-10-and-optimus/4/ nvidia forum . Always same simpthoms, but IN WINDOWS 8.1 EVERYTHING IS WORKING perfectly with proper Win8.1 drivers.

It is a problem of INTEL Graphics because it asks the discrete GPU for help in really simple 2D rendering situations. Seems not NVIDIA fault.

[Allan_J_Intel1]

There is a beta driver for Windows® 7,8 and 10. please give it a try: https://downloadcenter.intel.com/download/25541/Intel-Beta-Graphics-Driver-for-Windows-7-8-1-10-15-40- Download Intel® Beta Graphics Driver for Windows® 7/8.1/10* [15.40]

Allan.

[AScis1]

Already tried last week.

I had a lot of crashes on event log caused by igfxHK and igfxEM.exe and it didn't fix the random dGPU activation. So I went back to the 4300 wich at least don't cause events in event log

[Allan_J_Intel1]

Thank you for the information, I recommend waiting for newer drivers on https://downloadcenter.intel.com/ Drivers & Software

Allan.

[AScis1]

Isn't there any method to report this to driver developers?

[AScis1]

Are you going to provide a WDDM 2.0 driver instead of 1.3 ?

I suspect that being nvidia driver wddm 2.0 and Intel driver 1.3 is causing incompatibility

[Allan_J_Intel1]

Drivers update are posted as they become available at https://downloadcenter.intel.com/ Drivers & Software

Allan.

[JL10]

I have this same problem with a MSI GT60 with an Intel 4600 HD and a Nvidia 970m ever since I upgraded to Windows 10. It constantly activates the Nvidia card for the Windows user interface.