Question Laptop freezes when switching from dGPU to iGPU. (MUX SWITCH)

[Dejva1999]

Hello everyone,

I'm having a major issue with my laptop, and it's really frustrating. I have a laptop with a MUX switch and was counting on this feature to extend battery life during light tasks.

Here’s a video showing how the issue looks. It's from about a year ago on a slightly different Lenovo LOQ model I had before, but the problem persists on my new model as well (I foolishly thought it was only present on my older model).

View: https://www.youtube.com/watch?v=6o4zQfY7W6c

Specs:
CPU: Intel Core i5-13500H (Raptor Lake)
Display: 15.6" IPS, G-Sync, 2560 × 1440, 165Hz
RAM: 16GB DDR5
GPU: NVIDIA GeForce RTX 4060 8GB (115W, MUX switch)
Storage: 1TB SSD

Issue:
The problem occurs when switching from dGPU to iGPU after gaming. Every time I launch a game, the system correctly switches to the dGPU, and everything runs perfectly. However, once I exit the game, the system switches back to the iGPU, and then my screen starts freezing in 5-10 second intervals for about 2-3 seconds at a time. This issue persists until I restart the laptop. After a reboot, everything works fine on iGPU—until I start another game.

This happens in all power modes (Silent, Balanced, Performance) and whether the laptop is plugged in or running on battery.

Troubleshooting I've Tried (Without Success):
✔ Used DDU to completely uninstall both iGPU and dGPU drivers, then installed the latest ones
✔ Updated BIOS to the latest version
✔ Disabled various power-saving settings
✔ Tested different GPU modes (MUX switch enabled/disabled, hybrid mode, dGPU-only mode)

The only way to avoid the issue is to run on dGPU-only mode, but that significantly reduces battery life by about 2 hours.

Has anyone else experienced this? Any solutions that worked for you? I'd really appreciate any advice.

Thanks in advance!

 

[helpstar]

uninstall afterburner, hwinfo and other tools related to gpu
uninstall any antivirus, firewall of 3rd party companies

did you freshly install windows or clone it from your old laptop?

which intel gpu drivers and nvidia driver version are you using?

which exact lenovo model number is it?

undo power saving settings
was it happening before you did any changes to your laptop from factory as well
?

 

[Dejva1999]

I have a Lenovo LOQ 15IRH8 (Type 82XV) and recently installed a fresh version of Windows 11. Even after a clean reinstall, the issue persists. I have the latest drivers for both the iGPU and dGPU installed via Intel and NVIDIA software.

Right after resetting to factory settings, once the laptop automatically downloads its necessary updates and drivers, the issue starts occurring. I also tried uninstalling MSI Afterburner and HWiNFO, but that didn’t help.

 

[Dejva1999]

I read somewhere that installing driver 537.58 (October 4, 2023) might help, so I tried it, and so far, it seems to be working. However, it feels like the MUX switch isn't functioning properly, as it doesn't switch in the NVIDIA Control Panel, and I'm also a bit concerned about using drivers from 2023