SUMMARY took me ages as a user to find why my friend's computer wouldn't show image previews in dolphin and filechooser-dialog for images that were taken with a smartphone. The current limit on manjaro anyways is too small ~3MB (don't know what neon uses, couldn't find the info). It should be at least 15MB for today's needs for local images. EXPECTED RESULT Local images would show previews regardless of size (or some more sane file size default) as long as the image isn't corrupt. This is how windows does it I believe. Users should not have to spend time looking for a config file or change the behaviour themselves. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: kernel 4.x/Plasma 5.x (available in About System) KDE Plasma Version: 5.x KDE Frameworks Version: 5 Qt Version: 5 ADDITIONAL INFORMATION
Local images do show a preview regardless of size. Only for remote locations is it limited to 5 MiB by default. Can you provide the output of the following commands: kreadconfig5 --group "PreviewSettings" --key "MaximumSize" kreadconfig5 --group "PreviewSettings" --key "MaximumRemoteSize"
kreadconfig5 --group "PreviewSettings" --key "MaximumSize": 3145728 kreadconfig5 --group "PreviewSettings" --key "MaximumRemoteSize" prints no output when I changed the MaximumSize value to a bigger number, previews for local images would appear in dolphin but not before
Did you change any of those settings yourself? MaximumSize is empty by default, meaning no limit for local files. MaximumRemoteSize is 5 MiB by default, an empty value means no previews for remote files. What URL does the folder have that doesn't show previews?
It's a clean install so I haven't changed any of those values. The url is /home/$USERNAME$/Pictures
Then your distribution changed those values, report this issue to them. The maximum value of 3145728 corresponds to 3 MiB which could be too little for previewing pictures.