[supaol]

Hi everyone


I have just installed openfoam9 in windows with ubuntu 20.04 LTS and using wsl2 using the instructions from https://openfoam.org/download/windows/



There was no problem until i tried to launch paraview and ocurred this error:
--------------------------------------------------------------

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


I tried to see what the problem was using export QT_DEBUG_PLUGINS=1 and then executed paraview and this was the result:
-------------------------------------------------------------------
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.5.3",
"MetaData": {
"Keys": [
"eglfs"
]
},
"archreq": 0,
"className": "QEglFSIntegrationPlugin",
"debug": false,
"version": 330752
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.5.3",
"MetaData": {
"Keys": [
"linuxfb"
]
},
"archreq": 0,
"className": "QLinuxFbIntegrationPlugin",
"debug": false,
"version": 330752
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.5.3",
"MetaData": {
"Keys": [
"minimal"
]
},
"archreq": 0,
"className": "QMinimalIntegrationPlugin",
"debug": false,
"version": 330752
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.5.3",
"MetaData": {
"Keys": [
"minimalegl"
]
},
"archreq": 0,
"className": "QMinimalEglIntegrationPlugin",
"debug": false,
"version": 330752
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.5.3",
"MetaData": {
"Keys": [
"offscreen"
]
},
"archreq": 0,
"className": "QOffscreenIntegrationPlugin",
"debug": false,
"version": 330752
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.5.3",
"MetaData": {
"Keys": [
"vnc"
]
},
"archreq": 0,
"className": "QVncIntegrationPlugin",
"debug": false,
"version": 330752
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterfac e.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 "/opt/paraviewopenfoam56/lib/platforms" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
qt.qpa.xcb: could not connect to display :0
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, xcb.

Aborted
---------------------------------------------------------------------
I have had a hard time trying to find what the problem is but I cannot find the solution.


I would be greatfull if anyone can help me.


Thanks

[lvwarren]

I get the same error in MacOS when XQuartz-->Preferences-->Security does not have the box checked that says Allow connections from network clients.
Figuring this out required reviewing the install document:
https://openfoam.org/download/9-macos/ --> Step 4

Hope this helps.

[Nolwenn]

Hello,
The same for me. Did you find a solution ?
Thanks

[lvwarren]

Originally Posted by Nolwenn

The same for me. Did you find a solution ?

Review the post above. Network connections must be enabled.

[Nolwenn]

Originally Posted by lvwarren

Review the post above. Network connections must be enabled.

Sorry, I forgot to precise something: I am using Windows, not Mac ...

[Nolwenn]

Hello,
I finally realise that I had the same issue with all graphical applications.
A way around for me was to update the display IP adress and playing a little with Xlaunch settings (all tick on the extra settings).

[saqibjamshed]

Originally Posted by Nolwenn

Hello,
I finally realise that I had the same issue with all graphical applications.
A way around for me was to update the display IP adress and playing a little with Xlaunch settings (all tick on the extra settings).

Can you please more elaborate the solution with steps and graphics.

[anishdesouza246]

Same problem for me. Using OpenFOAM in Ubuntu on windows using WSL2. Please help

[Danton]

Same problem for me. Using OpenFOAM in Ubuntu on windows using WSL2.

I had a working version for some time.
Then I had problems with the Tutorials "first glimpse" series.
Trying to solve the problems I must have spoiled the installation or some Windows settings.

I tried many times to remove Ubuntu (Versions 18.04 and 20.04) in WSL, reinstalling it and different ways of installing OpenFOAM and ParaView again.
I have tried different Windows X Server software (Xming, VcXsrv, …) with similar results.

I can't restore the state where it was working any more.
I can't work through the tutorials to learn OpenFOAM and ParaView.

[Danton]

I've got a semi satisfactory solution now.
I tried many combinations of Ubuntu versions, software versions, installation procedures and WSL settings.
After googling a lot, I found out that the problems where not ParaView specific.
So, to shorten the tests, instead of always installing OpenFOAM and ParaView, I just installed some X11 Apps with
sudo apt install x11-apps -y and tested one of them (xcalc, xclock or xeyes).
This way, I found out that the X11 Apps only work in Ubuntu 18.04 with WSL1 installed.
Neither Ubuntu 20.04 nor WSL2 would work.
So, if you have Ubuntu 20.04, uninstall it in Windows with Start Settings Apps Apps & features.
In the PowerShell enter wsl --set-default-version 1, to set the environment to WSL1 for the next installation.
If already Ubuntu 18.04 is installed, you can use the command wsl --set-version Ubuntu-18.04 1 to change the environment to WSL1.
After seeing that one of the X11 Apps works correctly, you can install OpenFOAM and ParaView.
Using my installation procedures I ended up with ParaView version 5.4.1, which unfortunately is not the latest version.
My next task will be trying to install the latest version of ParaView.

[anishdesouza246]

I was having the same problem but now I managed to get it working. You would need to Download the VcXsrv installer. That can be found here
https://openfoam.org/download/windows/
Scroll down the page until to see it.
Follow the steps in that page and it will work

[Danton]

Originally Posted by anishdesouza246

I was having the same problem but now I managed to get it working.
You would need to Download the VcXsrv installer. That can be found here
https://openfoam.org/download/windows/
Scroll down the page until to see it.
Follow the steps in that page and it will work

Thank you so much!
The installation procedures from https://openfoam.org/download/windows/ are very clear and gave me a good working solution.
There are just two points to mention:

1. In my case now it's working with Ubuntu-20.04 in WSL1 (In WSL2 it was not working).
2. The VcXsrv installer is good, but others like Xming also work.

I'm happy with it.