+++ This bug was initially created as a clone of Bug #329608 (that bug was for the digikam part) +++ The thumbnail of pictures are not updated after picture manipulation outside dolphin if the file's modification time is kept (for instance rotation in digikam). Reproducible: Always Steps to Reproduce: 1. In dolphin, activate the preview mode in a directory containing pictures 2. Modify a picture and ensure the file's modification time is not updated (I use digikam to rotate a picture) 3. Go back to dolphin -> the picture thumbnail is never refreshed (even after F5). However the preview in the information panel is correct -> see attachment below [the preview in the right is correct ; the thumbnail in the left is not]. -> attachment 84456 [details] : https://bugs.kde.org/attachment.cgi?id=84456 If I rename or move the picture -> the thumbnail is recreated and is correct. If I re-rename the file to its original name -> the thumbnail is incorrect again. If I "touch" (command line) the picture -> the thumbnail is recreated and is correct. Remark: There is no problem if the file's modification time is updated. However, manipulate a picture and not touch to the file's modification time is a common use case (especially for pictures if you want to preserve pictures order for instance) and must be taken into account.
Is this still an issue with KDE Frameworks 5.47
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I tested again with KDE Frameworks 5.48 and the behaviour is exactly the same as in the original bug report comment #1 Picture thumbnail never updated in main view of Dolphin (when timestamp not changed). The strange thing is that the picture is well updated in the Information Panel.
The 'Thumbnail of picture in dolphin never updated after picture manipulation if file's modification time kept' is intentional as told by the Thumbnail Managing Standard - https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-0.8.0.html ...and there 7. Detect Modifications - https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-0.8.0.html#MODIFICATIONS "One important thing is to assure that the thumbnail image displays the same information than the original, only in a downscaled version. To make this possible we use the modification time stored in the required 'Thumb::MTime' key and check if it's equal the current modification time of the original. If not we must recreate the thumbnail."
(In reply to Nicofo from comment #3) > > The strange thing is that the picture is well updated in the Information > Panel. The Dolphin Information panel is not using the thumbnail cache. The preview image is made as needed.