Text Invisible

[rockaday]

I recently upgraded from Fedora 37 to Fedora 38, and that upgraded VLC. At the same time I installed the latest nvidia drivers for my system (x86_64-535.86.05). After the upgrade, I can no longer see text in much of VLC. For example, I can't see text on the configuration pages. And I can't see the time when playing a video. If I click the window and start to drag it, I can see some text while dragging. But if I stop dragging it disappears again.

Here are screenshots so you can understand: https://postimg.cc/gallery/cYd3MHs

And here's my installed package information:

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$ dnf info vlc Last metadata expiration check: 0:23:45 ago on Sat 29 Jul 2023 12:21:55 PM EDT. Installed Packages Name : vlc Epoch : 1 Version : 3.0.19 Release : 0.3.fc38.1 Architecture : x86_64 Size : 4.4 M Source : vlc-3.0.19-0.3.fc38.1.src.rpm Repository : @System From repo : rpmfusion-free Summary : The cross-platform open-source multimedia framework, player and server URL : https://www.videolan.org License : GPLv2+

I already put settings to default.

I wonder if it has something to with it being a Qt GUI app, or if there might be a certain Qt library missing or something? I noticed one other Qt app that also looked weird after the upgrade, but all my other apps seem fine.

I'm on Fedora Cinnamon spin.

[Rémi Denis-Courmont]

This seems like a Qt problem

[rockaday]

I discovered that if I go to system preferences => Theme => and change Appearance from Dark to either Light or Mixed, then I can see the text.

Style is set to Mint-Y. But I just found if I change style to Adwaita and choose Appearance Dark, that also makes text appear again.

So the problem seems to be specific to Mint-Y theme, Appearance Dark.

I created a Qt bug for it: https://bugreports.qt.io/browse/QTBUG-115937

But after I discovered it was connected to the Theme, I created a Cinnamon bug for it: https://github.com/linuxmint/cinnamon/issues/11817

[rockaday]

This seems like a Qt problem

How do I find out which version of Qt is implicated by my installation of VLC?

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Installed Packages Name : vlc Epoch : 1 Version : 3.0.19 Release : 0.3.fc38.1 Architecture : x86_64 Size : 4.4 M Source : vlc-3.0.19-0.3.fc38.1.src.rpm Repository : @System From repo : rpmfusion-free

Link to RPM Fusion download page.

Output when I start it:

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VLC media player 3.0.19 Vetinari (revision ) [0000562f9dd23520] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. [0000562f9ddbfb80] main playlist: playlist is empty

[rockaday]

How do I find out which version of Qt is implicated by my installation of VLC?

I was able to get it while VLC was running by passing the process ID to the pldd utility. Then checking the installed version of qt5-base (or qt6-base if you see qt6) with DNF.

[Rémi Denis-Courmont]

Based on earlier comments it's a bug with a Qt theme, not with Qt proper.