OpenCV python GUI window receiving last keypress from previous runs even after closing WSL

[eric-kwok-nt]

For WSL users, the GUI window will receive the last keypress from previous run. i.e. after pressing q to close the GUI window such as a video output from cv2.imshow(), when the user runs a script again, cv2.waitKey(1) & 0xFF == ord("q") will be evaluated to True without the user pressing anything, causing the video output to end prematurely.

Same issue has been documented in microsoft/wslg#213

[liyier90]

After updating WSL2 to the latest version with wsl --update, this issue appears to be resolved.

WSL2 version after update:

WSL version: 1.0.3.0
Kernel version: 5.15.79.1
WSLg version: 1.0.47
MSRDC version: 1.2.3575
Direct3D version: 1.606.4
DXCore version: 10.0.25131.1002-220531-1700.rs-onecore-base2-hyp
Windows version: 10.0.19045.2364