qt.qpa.xcb: could not connect to display :0

[karanjakhar]

Please guide me. I tried many ways but unable to solve this issue.

[electricalgorithm]

Could you send us your CUDA version?

[carlosedubarreto]

@karanjakhar
to see the cuda version you can type.

nvcc --version

here is an example of the result

[karanjakhar]

[sohaiblaraba]

This is related to some conflict between OpenCV and PyQT.

Try uninstalling both and reinstall them using these versions that seem to work together with no problem.

opencv-python==4.1.0.25 and pyqt 5.9.2

[ivanodapice]

I have also the same problem, tried to uninstall and install the specified version of pyqt and opencv-python but it didn't solve the situation. Ubuntu 20.04.1 LTS

[rklasen]

This is related to some conflict between OpenCV and PyQT.

Try uninstalling both and reinstall them using these versions that seem to work together with no problem.

opencv-python==4.1.0.25 and pyqt 5.9.2

That worked for me. It can be done in the requrements.txt as well, and then the docker image works too. i.e. change pyqt5==5.14.2 (or what it was, i forgot) to pyqt5==5.9.2 and rebuild the docker image with docker-compose up --build # Expect some time before UI appears. Tested on Ubuntu 20.10, nvidia-drivers-450 and cuda 11 on host. It seems it uses cuda 10 automatically in the container.

[sohaiblaraba]

This is related to some conflict between OpenCV and PyQT.
Try uninstalling both and reinstall them using these versions that seem to work together with no problem.
opencv-python==4.1.0.25 and pyqt 5.9.2

That worked for me. It can be done in the requrements.txt as well, and then the docker image works too. i.e. change pyqt5==5.14.2 (or what it was, i forgot) to pyqt5==5.9.2 and rebuild the docker image with docker-compose up --build # Expect some time before UI appears. Tested on Ubuntu 20.10, nvidia-drivers-450 and cuda 11 on host. It seems it uses cuda 10 automatically in the container.

I happy that it worked for you :))

[zhywanna]

I have also the same problem, tried to uninstall and install the specified version of pyqt and opencv-python but it didn't solve the situation. Ubuntu 20.04.1 LTS

Same. Did you solve this problem?