Run Environment is missing DISPLAY env variable

[vikramg]

When deploying to a device (Odroid in this case, but the specific device is not significant), the Run Environment is lacking the DISPLAY env variable. This causes the deployment to fail with a QXcbConnection: Could not connect to display error. Adding the DISPLAY variable set to :0 allows the application to launch correctly.

If I check env in a shell on the target device, the DISPLAY variable is of course set to :0, as expected. But hitting "Fetch Device Environment" in QtCreator pulls in only a small subset (crucially, missing DISPLAY) from the device environment.

How can this be fixed, besides adding that variable manually every time I open a project?

[raven-worx]

@vikramg
you can try qputenv before creating a QApplication instance.

[vikramg]

Thanks @raven-worx
I'm not convinced that any proactive action ought to be required, but I have verified that adding qputenv("DISPLAY", ":0"); before creating the QApplication instance does indeed work.