I'm developing an application using Python 3 / PyQt5. Everything seems ship-shape until I try to run the GUI (which is partially reliant on a live graph that is backed by pyqtgraph) on my Raspberry Pi 2 Model B (Raspbian Jessie), when it throws the error
libEGL warning: DRI2: failed to authenticate. This question has a potential fix, but it's very long and might not be exactly what I need, so I don't want to embark on that reconfig journey unless I absolutely have to. I'm trying to make this software easy to configure on a fresh installation.
Exactly what happens: I execute my application from the terminal (
python3 app.py) on the Pi. The application does start, but throws the aforementioned
libEGL warning. My application consists of a starting window that has buttons to open the functional portions of my application. This starts fine, but when I try to open my "control panel" with a live plot in it, this new window stops responding. There is no Python error traceback.