open a browser, for example, press Ctrl-O to display the file-open dialog. Press F11 to show the preview panel Notice, that clicking on PNG files do only display a placeholder icon in the preview, other file-types (that i have tested) do work normally and do display a preview image. Normal operation of dolphin is surprisingly ok (e.g. start dolphin at the commandline) The same error is with directories - 'normal' dolphin displays a folder icon with up to 4 preview thumbnails, 'open file' does not.
Created attachment 174617 [details] file-open preview
Operating System: Fedora Linux 40 KDE Plasma Version: 6.2.0 KDE Frameworks Version: 6.7.0 Qt Version: 6.7.2 Kernel Version: 6.10.13-200.fc40.x86_64 (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 PRO 7840U w/ Radeon 780M Graphics Memory: 58,5 GiB of RAM Graphics Processor: AMD Radeon 780M Manufacturer: LENOVO Product Name: 21K5000JGE System Version: ThinkPad P14s Gen 4
After the last system update I have the same problem - in the preview side view in file open/save dialogs and in Krusader. Krusader is using KIO::KImageFilePreview to show file previews and when selecting a PNG file this is written as debug message: > kf.coreaddons: "Could not find plugin gdk-pixbuf-thumbnailer" I have gdk-pixbuf2 (2.42.12) installed. My environment: Operating System: Arch Linux KDE Plasma Version: 6.2.1 KDE Frameworks Version: 6.7.0 Qt Version: 6.8.0 Kernel Version: 6.11.4-arch1-1 (64-bit) Graphics Platform: Wayland
In plasma 6.2.2, the problem is at two places: information panel in Dolphin and also the preview panel in open/save dialogs, they fail to show preview of some formats like heif, png While previews of png, heif… are correctly generated in the regular view inside Dolphin. Running Dolphin from terminal shows the following error: kf.coreaddons: "Could not find plugin gdk-pixbuf-thumbnailer"