Arch Linux

benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

Wow, this worked: QT_STYLE_OVERRIDE= QT_QPA_PLATFORMTHEME=gtk3 XDG_CURRENT_DESKTOP= kasts.

Truly all that was necessary was QT_QPA_PLATFORMTHEME=gtk3 kasts

seth

Member

Registered: 2012-09-03

Posts: 63,446

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

It's gonna be either the KDE platform plugin, your visual style or - in case that's actually selected and since it's always soemhow at the end of a problem, the deepin platform plugin.

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benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

I've tested switching to the default Breeze theme and there was no impact. I also went ahead and completely uninstalled everything deepin on my system including the platform plugins. I looked up the kde plugins but a pacman -Qs plugin | grep kde gave me these options and I am not sure which would be the platform plugin:

local/dolphin-plugins 22.12.2-1 (kde-applications kdesdk)
local/kdecoration 5.27.2-1 (plasma)
local/kdenetwork-filesharing 22.12.2-1 (kde-applications kde-network)
local/kdesdk-thumbnailers 22.12.2-1 (kde-applications kdesdk)
local/kdevelop-php 22.12.2-1 (kde-applications kdevelop)
local/kipi-plugins 22.04.0-1 (kde-applications kde-graphics)
local/telepathy-kde-contact-runner 22.12.2-1 (kde-applications kde-network telepathy-kde)
local/telepathy-kde-send-file 22.12.2-1 (kde-applications kde-network telepathy-kde)

seth

Member

Registered: 2012-09-03

Posts: 63,446

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

QT_QPA_PLATFORMTHEME=kde kasts

exhibits the problem?
https://archlinux.org/packages/extra/x8 … tegration/ => probably https://archlinux.org/packages/extra/x8 … top-style/

Install https://archlinux.org/packages/community/x86_64/qt5ct/ and use that as your platform theme and report a bug to KDE

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

QT_QPA_PLATFORMTHEME=kde kasts produces the same bug.

Bug reported https://bugs.kde.org/show_bug.cgi?id=466804

Installed qt5ct and set theme in KDE application styles but this did not resolve.

seth

Member

Registered: 2012-09-03

Posts: 63,446

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

You'll still have to set "QT_QPA_PLATFORMTHEME=qt5ct" for qt5ct to be used.

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

I tried exporting that in my .xprofile but it introduced visual bugs in most of the rest of plasma. So as a stopgap, I am on a per-application basis editing the .desktop files to add QT_QPA_PLATFORMTHEME=qt5ct for known problem programs.

seth

Member

Registered: 2012-09-03

Posts: 63,446

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

'key…

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Also you might want to update the kasts bug w/ the recent results.

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

I'll consider it partially solved since we got to the point of the bug report and workaround.

benm

Member

Registered: 2021-03-28

Posts: 90

Re: [SOLVED] Visual bug in QML based GUIs (bug reported, workaround found)

Sorry to necro-bump this thread but in case future searchers come around, passing QT_QPA_PLATFORMTHEME=qt5ct prevented kdenlive from crashing on launch for me.

Edited 10/23/20203:

The root cause of this issue I have finally discovered.
kcmshell5 qtquicksettings had rendering set to software and I changed it to Automatic, fixing the problem. I do not know how software was initially selected as I didn't know about these settings' existence, but this has fixed all my problems related to this globally.

Last edited by benm (2023-10-23 23:54:56)