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Is "libegl warning: dri2: failed to authenticate" error significant in QtCreator?



  • I have QtCreator installed on a Raspberry Pi 3 and I am developing on it directly. When I start QtCreator from a terminal on the R_Pi desktop I get "libegl warning: dri2: failed to authenticate" and "No tool chain set from kit R_Pi_Desktop" and then QtCreator starts up and runs as expected.

    I can edit my GUI in QtCreator but am unable to build and run the edited version. It runs a previous version instead.

    Can I ignore the warnings listed when QtCreator starts up or are they significant. Are those errors causing my inability to build and run GUIs, or are they unrelated?

    I have searched for possible solutions but nothing appears relevant.

    Thank you for your help.


  • Lifetime Qt Champion

    Hi and welcome to devnet,

    What distribution are you running ?
    Did you compile Qt / Qt Creator yourself ?



  • I am using the 2017-01-11-raspbian-jessie image.

    I got qtcreator on the R_Pi 3 by typing:
    sudo apt-get install qt5-default
    sudo apt-get install qtcreator

    I suppose this means I did not compile qt Creator myself.
    To run qtcreator, I open a terminal from the R_Pi desktop and type qtcreator.


  • Lifetime Qt Champion

    Indeed, you didn't build anything.

    Then what error are you getting when trying to build your application ?



  • The compile output has no errors. When I try to run the GUI I get the libEGL warning again then a previous version of the GUI shows up.


  • Lifetime Qt Champion

    What do you mean by previous ?



  • I have figured out the issue with running the previous version of the GUI. I wasn't setting things up correctly. That just leaves the question in the title. Thank you for your help so far.


  • Lifetime Qt Champion

    I'd say that if everything is running correctly, keep an eye on it but continue developing :)


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