Troubleshooting¶
Can’t reconstruct with FBP_CUDA and SIRT_CUDA¶
These algorithms have 2 requirements:
Having a CUDA-compatible graphics card (GPU)
Having the CUDA Runtime 10.2 libraries installed
Having a CUDA-compatible graphics card¶
Please check that your GPU is on the list of compatible GPUs https://developer.nvidia.com/cuda-gpus
Having the CUDA Runtime 10.2 libraries installed¶
Please install the CUDA Runtime version 10.2 binaries from https://developer.nvidia.com/cuda-10.2-download-archive
Reinstalling CUDA on Linux can be quickly done with this script
# uninstall nvidia driver and cuda driver
nvidia-uninstall && /usr/local/cuda/bin/cuda-uninstaller
# download the CUDA installer
wget http://developer.download.nvidia.com/compute/cuda/10.2/Prod/local_installers/cuda_10.2.89_440.33.01_linux.run ~/Downloads/cuda_10.2.89_440.33.01_linux.run
# install GPU driver and CUDA Toolkit from CLI silently
sudo bash ~/Downloads/cuda_10.2.89_440.33.01_linux.run --silent --driver --toolkit
Specific Errors¶
SystemError: <built-in function connectSlotsByName> returned a result with an error set¶
This means that the PyQt package is missing or an old version (it must be newer than PyQt5==5.13.2)
Suggested Fix¶
Install PyQt5 and pyqtgraph with pip install pyqt5==5.15 pyqtgraph==0.12
qt.qpa.plugin: Could not load the Qt platform plugin “xcb” in “” even though it was found.¶
This might mean some system libraries are missing
Suggested Fix¶
Try installing apt install libxcb-xinerama0
qt.qpa.xcb: could not connect to display…¶
Missing DISPLAY variable. This means the application cannot find the display to show itself on.
Suggested Fix¶
You can set this via export DISPLAY=:N where :N should be the number of your display.