<< Anaconda and Ubuntu 21.10 >>

Product Help
1

I updated my Ubuntu box few days ago to latest version 21.10.

Now, I am getting several errors running well-functioning Pythons software. Even the Anaconda Navigator (updated too) isn’t working. Here is the error message:

2021-11-24 11:03:24,496 - WARNING linux_scaling.get_scaling_factor_using_dbus:39
Can't detect system scaling factor settings for primary monitor.

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
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.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

Aborted (core dumped)

Using export QT_DEBUG_PLUGINS=1 I got:

2021-11-24 11:09:24,211 - WARNING linux_scaling.get_scaling_factor_using_dbus:39
Can't detect system scaling factor settings for primary monitor.

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
QFactoryLoader::QFactoryLoader() checking directory path "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 0,
    "className": "QWebGLIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("webgl")
QFactoryLoader::QFactoryLoader() looking at "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so"
Found metadata in lib /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/icamps/anaconda3/bin/platforms" ...
Cannot load library /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/../../lib/libQt5XcbQpa.so.5: undefined symbol: _ZTI23QPlatformVulkanInstance, version Qt_5_PRIVATE_API)
QLibraryPrivate::loadPlugin failed on "/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (/home/icamps/anaconda3/lib/python3.8/site-packages/PyQt5/Qt/plugins/platforms/../../lib/libQt5XcbQpa.so.5: undefined symbol: _ZTI23QPlatformVulkanInstance, version Qt_5_PRIVATE_API)"
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.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

I appreciate any help.

Camps

2

Hi Camps,

There could be a number of things going on here. First off, can you tell us if you have set $LD_LIBRARY_PATH or $LD_PRELOAD?

You might also try following the instructions here, to see if that helps:
https://bbs.archlinux.org/viewtopic.php?id=247030

3

Also, did you by any chance do a pip install for PyQt?

4

Hi @Peter_Wang . Thanks for your answer.

I didn’t changed/add nothing in $LD_LIBRARY_PATH neither $LD_PRELOAD related to Conda/Python by hand. I just updated my Ubuntu, from 21.04 to 21.10. In 21.04, everything with Conda was running well.

The $LD_LIBRARY_PATH is:

/software/mopac/mopac_cuda_5.5_libs:/software/intel/compilers_and_libraries_2020.4.304/linux/mpi/intel64/libfabric/lib:/software/intel/compilers_and_libraries_2020.4.304/linux/mpi/intel64/lib/release:/software/intel/compilers_and_libraries_2020.4.304/linux/mpi/intel64/lib:/software/intel/compilers_and_libraries_2020.4.304/linux/compiler/lib/intel64_lin:/software/intel/compilers_and_libraries_2020.4.304/linux/mpi/intel64/libfabric/lib:/software/intel/compilers_and_libraries_2020.4.304/linux/mpi/intel64/lib/release:/software/intel/compilers_and_libraries_2020.4.304/linux/mpi/intel64/lib:/software/intel/compilers_and_libraries_2020.4.304/linux/mkl/lib/intel64_lin:/software/intel/compilers_and_libraries_2020.4.304/linux/tbb/lib/intel64/gcc4.8:/software/intel/debugger_2020/python/intel64/lib:/software/intel/debugger_2020/libipt/intel64/lib:/usr/local/cuda-11.2//lib64:/usr/local/cuda-11.2//lib:/software/SIESTA-Libs/elpa-2020.11.001/lib:/home/icamps/bin/mmpbsa/apbs-1.3-amd64/lib:/software/VESTA-gtk3

And $LD_PRELOAD is empty.

I look the link you send me but didn’t found how to solve my issue.

5

Yep.

Here is the list of all packages installed:


Package                 Version
----------------------- -------------
apturl                  0.5.2
argcomplete             1.8.1
bcrypt                  3.1.7
binwalk                 2.3.2
blinker                 1.4
Brlapi                  0.8.2
cclib                   1.6.2
certifi                 2020.6.20
cftime                  1.5.1.1
chardet                 4.0.0
chrome-gnome-shell      0.0.0
click                   7.1.2
colorama                0.4.4
command-not-found       0.3
cryptography            3.3.2
cupshelpers             1.0
cycler                  0.11.0
dbus-python             1.2.16
defer                   1.0.6
defusedxml              0.6.0
diffoscope              180
distro                  1.5.0
distro-info             1.0
docopt                  0.6.2
DSV                     1.4.1
duplicity               0.8.20
EditorConfig            0.12.2
enjarify                1.0.3
fasteners               0.14.1
future                  0.18.2
httplib2                0.18.1
idna                    2.10
imageio                 2.10.4
importlib-metadata      4.0.1
jeepney                 0.7.1
jsbeautifier            1.13.0
jsondiff                1.1.1
keyring                 23.0.1
kiwisolver              1.3.2
language-selector       0.1
launchpadlib            1.10.13
lazr.restfulclient      0.14.2
lazr.uri                1.0.5
libarchive-c            2.9
lockfile                0.12.2
louis                   3.18.0
macaroonbakery          1.3.1
Mako                    1.1.3
MarkupSafe              1.1.1
matplotlib              3.4.3
membernator             1.1.0
monotonic               1.5
more-itertools          4.2.0
msgpack                 1.0.0
msgpack-numpy           0.4.4
natsort                 7.1.0
netCDF4                 1.5.8
netifaces               0.10.9
networkx                2.6.3
numpy                   1.21.4
oauthlib                3.1.0
olefile                 0.46
paramiko                2.7.2
pdfminer.six            20200726
pexpect                 4.8.0
Pillow                  8.4.0
pip                     20.3.4
progressbar             2.5
protobuf                3.12.4
pycairo                 1.16.2
pycrypto                2.6.1
pycups                  2.0.1
pygame                  1.9.6
Pygments                2.7.1
PyGObject               3.40.1
PyJWT                   1.7.1
pymacaroons             0.13.0
PyNaCl                  1.4.0
PyOpenGL                3.1.5
pyparsing               3.0.6
PyPDF2                  1.26.0
PyQt5                   5.15.6
PyQt5-Qt5               5.15.2
PyQt5-sip               12.9.0
pyRFC3339               1.1
python-apt              2.2.1
python-dateutil         2.8.2
python-debian           0.1.39ubuntu1
python-magic            0.4.20
pytz                    2021.1
PyWavelets              1.2.0
pyxattr                 0.7.2
pyxdg                   0.27
PyYAML                  5.3.1
reportlab               3.5.66
requests                2.25.1
rpm                     4.16.1.2
scikit-image            0.18.3
scipy                   1.7.2
screen-resolution-extra 0.0.0
SecretStorage           3.3.1
setuptools              52.0.0
simplejson              3.17.2
sisl                    0.11.0
six                     1.16.0
sortedcontainers        2.1.0
stepic                  0.5.0
systemd-python          234
tifffile                2021.11.2
tlsh                    0.2.0
tqdm                    4.62.3
u-msgpack-python        2.3.0
ubuntu-advantage-tools  27.4
ubuntu-drivers-common   0.0.0
ufw                     0.36.1
unattended-upgrades     0.1
urllib3                 1.26.5
usb-creator             0.3.7
vboxapi                 1.0
wadllib                 1.3.5
wheel                   0.34.2
wxPython                4.0.7
xdg                     5
xkit                    0.0.0
zipp                    1.0.0