Liteide: Could not load the Qt platform plugin "xcb" in "" even though it was found.

[hfmrow]

Hi,
| Name | Version / Info / Name |
| ---------------------------------------------------------- | ---------------------------------------------- |
| GOLANG | V1.15.2 -> GO111MODULE="off", GOPROXY="direct" |
| DISTRIB | LinuxMint Xfce |
| VERSION | 20 |
| CODENAME | ulyana |
| RELEASE | #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 |
| UBUNTU_CODENAME | focal |
| KERNEL | 5.4.0-48-generic |
| HDWPLATFORM | x86_64 |
| GTK+ 3 | 3.24.20 |
| GLIB 2 | 2.64.3 |
| CAIRO | 1.16.0 |
| GtkSourceView | 4.6.0 |
| LiteIDE | 37.3 qt5.x |
| Qt5 | 5.12.8 in /usr/lib/x86_64-linux-gnu |

I'm using your excellent IDE for long time ago, never had issue on install except for this latest version, i've tried github: https://github.com/visualfc/liteide/releases/download/x37.3/liteidex37.3.linux64-qt5.5.1.tar.gz
and same from sourceforge.

as everytime, i put it to '/opt/liteide' with user rights.
but this time i got:

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: xcb.

Abandon (core dumped)

Just for information, LiteIDE 37.1-qt5.x work perfectly with same installation as described above.
I've tried to find solutions but each have failed, have you an idea to pass through this state ?

Thank for your work and your program, as i said, it's an excellent IDE for Golang development.

[gshields]

Same issue with ubuntu 20.04. I did apt install qt5-default,
Tried both the tar and the app image both fail with 37.3
Installed 37.1 and now it work
37.3 is broken for Ubuntu

[hfmrow]

Debug informations:

$ export QT_DEBUG_PLUGINS=1; /opt/liteide/bin/liteide
QFactoryLoader::QFactoryLoader() checking directory path "/opt/liteide/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/opt/liteide/plugins/platforms/libqxcb.so"
Found metadata in lib /opt/liteide/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 328961
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/opt/liteide/bin/platforms" ...
Cannot load library /opt/liteide/plugins/platforms/libqxcb.so: (/opt/liteide/plugins/platforms/../../lib/libQt5XcbQpa.so.5: undefined symbol: _ZN11QFontEngine14bitmapForGlyphEj6QFixedRK10QTransform)
QLibraryPrivate::loadPlugin failed on "/opt/liteide/plugins/platforms/libqxcb.so" : "Cannot load library /opt/liteide/plugins/platforms/libqxcb.so: (/opt/liteide/plugins/platforms/../../lib/libQt5XcbQpa.so.5: undefined symbol: _ZN11QFontEngine14bitmapForGlyphEj6QFixedRK10QTransform)"
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: xcb.

Abandon (core dumped)

[hfmrow]

And finally I found a solution that works for me (with my use of liteide)

rename libQt5XcbQpa.so.5 & libQt5Network.so.5

like that:

/opt/liteide/lib/libQt5XcbQpa.so.5~
/opt/liteide/lib/libQt5Network.so.5~

this way liteide does not use the built-in library but uses the library installed in Ubuntu 20 ...

[tetrahedronix]

This script may also solve the problem

#!/bin/sh

export LD_LIBRARY_PATH="/PATH/TO/liteide/lib:$LD_LIBRARY_PATH"

cd /PATH/TO/liteide/bin

./liteide

[hfmrow]

Yes thanks,
Added to .desktop file:

Exec=sh -c "export LD_LIBRARY_PATH=/opt/liteide/lib:$LD_LIBRARY_PATH; /opt/liteide/bin/liteide %F"

where "/opt/liteide/" is path to liteide.

[bertvandepoel]

This is a workaround, not a fix. This issue should not be closed, since it's a regression.