Bug 488283

Summary:	Thumbnails are not saved to the cache when .cache is a btrfs subvolume
Product:	[Applications] dolphin	Reporter:	ipha <ipha00>
Component:	general	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	kdedev, kfm-devel, kodyvonbargen
Priority:	NOR
Version First Reported In:	24.05.2
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=489762
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description ipha 2024-06-10 01:10:30 UTC

SUMMARY
Dolphin is not saving thumbnails to the cache and instead regenerates them every time a folder is opened.
It will however still use cached thumbnails if they're available(ie, generated with gwenview)

STEPS TO REPRODUCE
1.  Clear ~/.cache/thumbnails
2.  Browse a folder with pictures, let thumbnails generate
3.  Check ~/.cache/thumbnails, it's still empty

OBSERVED RESULT
thumbnail cache remains empty

EXPECTED RESULT
thumnails should be saved to the cache

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1

ADDITIONAL INFORMATION

Comment 1 ipha 2024-07-05 01:07:02 UTC

This issue only seems to appear when ~/.cache is a btrfs subvolume.

Comment 2 Kody 2024-11-29 13:46:27 UTC

This is happening to me, too. I think it's been happening for a long time for me, since I've noticed Dolphin regenerating thumbnails whenever I'd enter directories for a good while, but didn't look into it until now.

Operating System: Arch Linux 
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.0
Kernel Version: 6.12.1-arch1-1 (64-bit)
Graphics Platform: Wayland