Bug 511415 - Thumbnails are slow to view and fail to appear sometimes
Summary: Thumbnails are slow to view and fail to appear sometimes
Status: REPORTED
Alias: None
Product: frameworks-kio
Classification: Frameworks and Libraries
Component: Open/save dialogs (other bugs)
Version First Reported In: 6.19.0
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: KIO Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-10-31 09:48 UTC by medin
Modified: 2025-10-31 09:48 UTC (History)
1 user (show)

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Description medin 2025-10-31 09:48:43 UTC 
Steps:

1. Prepare a folder with more than 300 files containing quality images (>6mb) and some videos.
2. Try to open open/save dialog from Firefox then check that Show Preview is enabled.
3. Navigate to that folder containing images and videos and let it generate all thumbnails.
4. Close open/save dialog then reopen it again and navigate again to that folder.

Expected result:
Thumbnails show appears instantly.

Observed result:
Thumbnails are slow to appear like they are recreated each time you use open/save dialog. And sometimes when you scroll fast some images and videos never show their thumbnails.

NB: This behavior is not present when you browse such folder using Dolphin, thumbnails appears fast without any problem the second time you visit such folder.