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I trying to setup a docker image with Qt Creator. I am following the instructions in https://nicroland.wordpress.com/2015/12/06/running-qtcreator-in-docker/

But when running the docker image with the installer I get get a "blank black" dialogue, and a error message scrolling in the terminal.

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
[134] Warning: QXcbConnection: XCB error: 2 (BadValue), sequence: 458,resource id: 820, major code: 130 (Unknown), minor code: 3

When closing the dialogue it does show the normal widget like dialogue that ask "do you want to close the installer application"

Theuns Heydenrych
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1 Answers1

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I had the same problem and found the solution: when you call your QDialog form in your code you are probably doing : 

form * myform = new form(this);
myform->exec();

i resolved the issue by deleting the pointer:

add :

delete myform

I hope this helps ! good day

Yasmine Bekhiche
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