Qt apps always black

[gcardi]

After installed systemd applications using Qt exhibits always a black window. I've tried with VLC and QtCreator.

What I'm missing?

[gcardi]

Hi, I just noticed that starting a QT application as root (sudo su), it works just fine.

[gcardi]

This works:

giuliano@PC-GIULIANO10:~$ sudo ./qtcreator
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
qt.core.qobject.connect: QObject::connect: Cannot connect (nullptr)::usageStatisticsNotifier(const QString) to UsageStatistic::Internal::QmlDesignerUsageEventSource::handleUsageStatisticsNotifier(const QString)
qt.core.qobject.connect: QObject::connect: Cannot connect (nullptr)::usageStatisticsUsageTimer(const QString, int) to UsageStatistic::Internal::QmlDesignerUsageEventSource::handleUsageStatisticsUsageTimer(const QString, int)

This doesn't works:

giuliano@PC-GIULIANO10:~$ ./qtcreator
qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in ""
QApplication: invalid style override 'kvantum-dark' passed, ignoring it.
Available styles: Windows, Fusion
qt.core.qobject.connect: QObject::connect: Cannot connect (nullptr)::usageStatisticsNotifier(const QString) to UsageStatistic::Internal::QmlDesignerUsageEventSource::handleUsageStatisticsNotifier(const QString)
qt.core.qobject.connect: QObject::connect: Cannot connect (nullptr)::usageStatisticsUsageTimer(const QString, int) to UsageStatistic::Internal::QmlDesignerUsageEventSource::handleUsageStatisticsUsageTimer(const QString, int)

[crramirez]

Hello @gcardi ,

Try with this:

export XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir

Also, be sure that qt5-wayland or qt5-qtwayland packages are installed

[gcardi]

Hi. Thanks for the suggestion! I've tried, but Qt based apps like VLC are still all black. Thanks again. Cheers. Giuliano Il giorno mer 13 apr 2022 alle ore 10:29 Carlos Rafael Ramirez < ***@***.***> ha scritto:

…

Hello @gcardi <https://github.com/gcardi> , Try with this: export XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir — Reply to this email directly, view it on GitHub <#24 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABIALPGT2BEVSCIAM2HSDCDVE2AYJANCNFSM5OONE2MQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[crramirez]

I found that vlc is still black but QT creator, Konsole and others began to work after this change

[crramirez]

Also try export QT_QPA_PLATFORM=wayland

[gcardi]

Hi, with this “export” Konsole works like a charm! Thank you! :-) Giuliano From: Carlos Rafael Ramirez Sent: Thursday, April 14, 2022 7:34 PM To: diddledani/one-script-wsl2-systemd Cc: Giuliano Cardinali ; Mention Subject: Re: [diddledani/one-script-wsl2-systemd] Qt apps always black (Issue #24) Also try export QT_QPA_PLATFORM=wayland — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>