System freeze when resizing GPU-accelerated app windows in Optimus mode (Blender / Unity)

Gaming and Visualization Technologies General Topics and Other SDKs
1

Hello,

I’m experiencing a stability issue with my laptop (Ultra 9 275HX + RTX 5080) that occurs only in Optimus mode.

When I resize the application window of GPU-accelerated apps such as Blender or Unity, the system freezes for about 30 to 60 seconds and then recovers. After recovery, Reliability Monitor reports LiveKernelEvent, Code 141.

In Ultimate (dGPU-only / MUX) mode everything works normally. In iGPU-only mode it also works normally. The problem appears only on the hybrid / Optimus path.

For now my only reliable workaround is to stay in Ultimate mode, but that keeps the dGPU active at all times and drains the battery much faster, so it is not a practical long-term solution.

Things I’ve already tried:

  • Multiple NVIDIA Studio driver versions (oldest supported to latest)
  • Default ASUS Intel iGPU driver and the latest Intel driver
  • Disabled Hardware-Accelerated GPU Scheduling
  • Changed various NVIDIA Control Panel and Windows graphics settings
  • Tested different TDR delay values
  • Rebooted after each change

The issue is still reproducible.

How to reproduce:

  1. Switch the laptop to Optimus mode
  2. Open Blender or another GPU-accelerated app
  3. Manually resize the application window several times
  4. The entire system freezes for about a minute, and then recovers.

I would like to know if anyone else with an Intel Ultra + RTX laptop using Optimus can reproduce this behavior.

Any feedback or confirmation would be appreciated.

Laptop model: ROG Strix Scar 16 G635LW

Operating system: Windows 11 Pro 64-bit (10.0, Build 26200

Processor: Intel(R) Core™ Ultra 9 275HX

Card name: NVIDIA GeForce RTX 5080 Laptop GPU

Nvidia Graphics Driver Version: 32.0.15.9144

Intel Graphics Driver Version: 32.0.101.6790

2

Is anyone able to reproduce this issue on their laptop?
I’ve recorded a quick video demonstrating it: https://www.youtube.com/watch?v=ZfTTYyjpoPA

3

Hi @bobs91561, welcome to the NVIDIA developer forums!

I don’t have the equipment to reproduce and a quick look didn’t show similar issues in our bug tracking, but did you try and check in the GeForce forums?

It might be that there are more end users with similar setups.

Thanks!

4

Hi, thanks for the reply and for checking.

I’ve also posted this issue on the GeForce forums here, but haven’t received a response yet:

https://www.nvidia.com/en-us/geforce/forums/geforce-laptops/6/580270/freezes-when-resizing-gpu-accelerated-app-windows-/

Just to add more context, the problem also occurs on a clean Windows 11 25H2 install with OEM drivers as well as the latest NVIDIA and Intel graphics drivers. At this point, I’m not sure whether this is an NVIDIA, Intel, or Windows issue.