Qt app UI elements randomly rendered as blank/black in Docker

[Geeva]

I prepared Dockerfile to build Docker image of my Qt application. To run the application I use X - I enable access to X server (xhost +local:root) , then I use the following command to run it:

docker run -it --env="DISPLAY" --env="QT_X11_NO_MITSHM=1" \
    --volume="/tmp/.X11-unix:/tmp/.X11-unix:rw" mindforger:latest mindforger

The problem is that some Qt UI elements (menu items, dialogs, ...) are rendered blank in black (randomly) - check the screenshot below:

I'm on Ubuntu 16.04.5 with Docker 18.06 and Qt 5.01.

[sierdzio]

But... why? Why docker?

Anyway. Do other applications show normally? Like some standard Gnome/KDE apps.

I strongly recommend using something newer than Qt 5.0.1. It was an extremely buggy release. And it's super old.