I am encountering an issue where using QOpenGLWidget will destabilize my entire computer. Here is a minimal example that reproduces the issue for me: https://github.com/HBurd/qopenglwidget-repro. The example consists of a single window with a single QOpenGLWidget which simply clears the framebuffer to white.

The issue occurs sporadically when rapidly resizing the window. The symptoms include:

• Entire screen freezing for several seconds, including mouse
• Screen flashing black
• Graphical glitches in other running applications
• Integrated GPU pinned at 100% usage

Sometimes these issues resolve after I shut down the application. Other times, the issues persist and I am forced to reboot.

Inspecting in the windows event viewer, the system instability coincides with numerous TDR events, indicating a problem with the GPU driver.

I am using a laptop with an integrated GPU as well as a discrete NVIDIA GPU. The issues do not occur when I force the application to use integrated graphics in the NVIDIA control panel. They only occur when the setting is "auto-select" or "High-performance NVIDIA processor".

I would guess that something about how Qt is handling QOpenGLWidget resizing is interacting poorly with the GPU driver.

System information: 

• Thinkpad P14s
• CPU: Intel Core Ultra 7 155H
• GPU: NVIDIA RTX 500 Ada Generation Laptop GPU (Tested driver versions 550, 570, 580)
• RAM: 64 GB