Hello everyone,
I’m experiencing an issue when trying to run a PyQt5 application via a VNC session on an HPC server. Here’s a brief rundown of my setup:
- Environment: HPC cluster with interactive job submission.
- Command Used: Using VSCODE and
code-serverfor editing, submitted a job withbsuband initiatedcode-server. - GUI Application: A simple PyQt5 application that creates a basic window.
Problem Description:
When I attempt to run the PyQt5 script, I encounter a lengthy series of debug messages related to QFactoryLoader checking and loading platform plugins like libqeglfs.so, libqlinuxfb.so, etc., but it ends without indicating a specific error or failing to open the window. It seems like the application can’t properly initiate the GUI on the server through VNC.
Here is the minimal code snippet of the application:
# example.py
import sys
from PyQt5.QtWidgets import QApplication, QWidget
def main():
app = QApplication(sys.argv)
w = QWidget()
w.resize(250, 150)
w.move(300, 300)
w.setWindowTitle('Simple')
w.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
And here are the typical messages from running the application:
ot keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/labs/mayalab/barc/.conda/envs/testnewenv/bin/platforms" ...
Cannot load library /home/labs/mayalab/barc/.conda/envs/testnewenv/lib/python3.9/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so: (libxcb-icccm.so.4: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/labs/mayalab/barc/.conda/envs/testnewenv/lib/python3.9/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so" : "Cannot load library /home/labs/mayalab/barc/.conda/envs/testnewenv/lib/python3.9/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so: (libxcb-icccm.so.4: cannot open shared object file: No such file or directory)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Reinstalling the application didn’t fix the problem by the way.
OS details
(cellpose) [barc@accessv01 ~]$ hostnamectl
Static hostname: accessv01.wexac.weizmann.ac.il
Icon name: computer-vm
Chassis: vm 🖴
Machine ID: *************************************
Boot ID: *************************************
Virtualization: vmware
Operating System: Red Hat Enterprise Linux 9.1 (Plow)
CPE OS Name: cpe:/o:redhat:enterprise_linux:9::baseos
Kernel: Linux 5.14.0-162.6.1.el9_1.x86_64
Architecture: x86-64
Hardware Vendor: VMware, Inc.
Hardware Model: VMware Virtual Platform
conda list:
(cellpose) [barc@accessv01 ~]$ conda list
# packages in environment at /home/projects/zeeviai/barc/.conda/envs/cellpose:
#
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 2_gnu conda-forge
bzip2 1.0.8 h5eee18b_6
ca-certificates 2024.3.11 h06a4308_0
cellpose 3.0.8 pypi_0 pypi
cyrus-sasl 2.1.28 h52b45da_1
dbus 1.13.18 hb2f20db_0
expat 2.6.2 h6a678d5_0
fastremap 1.14.1 pypi_0 pypi
filelock 3.14.0 pypi_0 pypi
fontconfig 2.14.1 h4c34cd2_2
freetype 2.12.1 h4a9f257_0
fsspec 2024.3.1 pypi_0 pypi
glib 2.78.4 h6a678d5_0
glib-tools 2.78.4 h6a678d5_0
gst-plugins-base 1.14.1 h6a678d5_1
gstreamer 1.14.1 h5eee18b_1
icu 73.1 h6a678d5_0
imagecodecs 2023.3.16 pypi_0 pypi
importlib-metadata 7.1.0 pypi_0 pypi
jinja2 3.1.4 pypi_0 pypi
jpeg 9e h5eee18b_1
krb5 1.20.1 h143b758_1
ld_impl_linux-64 2.38 h1181459_1
libclang 14.0.6 default_hc6dbbc7_1
libclang13 14.0.6 default_he11475f_1
libcups 2.4.2 h2d74bed_1
libedit 3.1.20230828 h5eee18b_0
libffi 3.4.4 h6a678d5_1
libgcc-ng 13.2.0 h77fa898_7 conda-forge
libglib 2.78.4 hdc74915_0
libgomp 13.2.0 h77fa898_7 conda-forge
libiconv 1.16 h5eee18b_3
libllvm14 14.0.6 hdb19cb5_3
libpng 1.6.39 h5eee18b_0
libpq 12.17 hdbd6064_0
libstdcxx-ng 11.2.0 h1234567_1
libuuid 1.41.5 h5eee18b_0
libxcb 1.16 hd590300_0 conda-forge
libxkbcommon 1.0.1 h5eee18b_1
libxml2 2.10.4 hfdd30dd_2
llvmlite 0.41.1 pypi_0 pypi
lz4-c 1.9.4 h6a678d5_1
markupsafe 2.1.5 pypi_0 pypi
mpmath 1.3.0 pypi_0 pypi
mysql 5.7.24 h721c034_2
natsort 8.4.0 pypi_0 pypi
ncurses 6.4 h6a678d5_0
networkx 3.1 pypi_0 pypi
numba 0.58.1 pypi_0 pypi
numpy 1.24.4 pypi_0 pypi
nvidia-cublas-cu12 12.1.3.1 pypi_0 pypi
nvidia-cuda-cupti-cu12 12.1.105 pypi_0 pypi
nvidia-cuda-nvrtc-cu12 12.1.105 pypi_0 pypi
nvidia-cuda-runtime-cu12 12.1.105 pypi_0 pypi
nvidia-cudnn-cu12 8.9.2.26 pypi_0 pypi
nvidia-cufft-cu12 11.0.2.54 pypi_0 pypi
nvidia-curand-cu12 10.3.2.106 pypi_0 pypi
nvidia-cusolver-cu12 11.4.5.107 pypi_0 pypi
nvidia-cusparse-cu12 12.1.0.106 pypi_0 pypi
nvidia-nccl-cu12 2.20.5 pypi_0 pypi
nvidia-nvjitlink-cu12 12.4.127 pypi_0 pypi
nvidia-nvtx-cu12 12.1.105 pypi_0 pypi
opencv-python-headless 4.9.0.80 pypi_0 pypi
openssl 3.0.13 h7f8727e_1
packaging 24.0 pypi_0 pypi
pcre2 10.42 hebb0a14_1
pip 24.0 py38h06a4308_0
ply 3.11 py38_0
pthread-stubs 0.3 h0ce48e5_1
pygments 2.18.0 pypi_0 pypi
pyqt 5.15.10 py38h6a678d5_0
pyqt5-qt5 5.15.2 pypi_0 pypi
pyqt5-sip 12.13.0 py38h5eee18b_0
pyqt6-sip 13.6.0 pypi_0 pypi
pyqtgraph 0.13.3 pypi_0 pypi
python 3.8.19 h955ad1f_0
qt-main 5.15.2 h53bd1ea_10
qtpy 2.4.1 pypi_0 pypi
readline 8.2 h5eee18b_0
roifile 2023.5.12 pypi_0 pypi
scipy 1.10.1 pypi_0 pypi
setuptools 69.5.1 py38h06a4308_0
sip 6.7.12 py38h6a678d5_0
sqlite 3.45.3 h5eee18b_0
superqt 0.6.5 pypi_0 pypi
sympy 1.12 pypi_0 pypi
tifffile 2023.7.10 pypi_0 pypi
tk 8.6.14 h39e8969_0
tomli 2.0.1 py38h06a4308_0
torch 2.3.0 pypi_0 pypi
tqdm 4.66.4 pypi_0 pypi
triton 2.3.0 pypi_0 pypi
typing-extensions 4.11.0 pypi_0 pypi
wheel 0.43.0 py38h06a4308_0
xorg-libxau 1.0.11 hd590300_0 conda-forge
xorg-libxdmcp 1.1.3 h7f98852_0 conda-forge
xz 5.4.6 h5eee18b_1
zipp 3.18.1 pypi_0 pypi
zlib 1.2.13 h5eee18b_1
zstd 1.5.5 hc292b87_2