Bug 464143

Summary:	Thumbnails on images loading very inconsistently
Product:	[Plasma] xdg-desktop-portal-kde	Reporter:	Henning <boredsquirrel>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	aleixpol, jgrulich, nate
Priority:	NOR	Keywords:	wayland-only
Version First Reported In:	5.26.5
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Henning 2023-01-11 11:22:41 UTC

SUMMARY
While in Dolphin Thumbnails appeas normally, the Portal chooser, for example for sending a file in Signal Flatpak, sometimes doesnt load thumbnails at all, sometimes only of older images, sometimes all.


STEPS TO REPRODUCE
1. use a flatpak app and "open file"
2. choose a folder with images
3. 

OBSERVED RESULT
image loading is inconsistent, often reloading, changing when zooming view

EXPECTED RESULT
normal image thumbnails like in dolphin

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 37
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.7
Kernel Version: 6.0.18-300.fc37.x86_64 (64-bit)
Graphics Platform: Wayland

Comment 1 Henning 2024-07-27 10:17:39 UTC

This is still happening and it is really strange and impacting usability a lot

Comment 2 Nate Graham 2024-07-29 20:10:10 UTC

Only in the portal open/save dialog? Or also in any non-portal open/save dialogs as well? And how about in Dolphin?

Comment 3 Henning 2024-07-31 18:01:14 UTC

Still only in the filechooser portal.

Tried on the same folder, a camera folder containing mostly JPG files.

In Dolphin, it is not really fast but works fine, when using Firefox (with "use portal" in "about:config" enabled) the same folder, pictures appear waaay slower like 5 times slower, sometimes disappear again.

This may be a memory saving issue? Or a process priority issue? 

Unloading "old" preview thumbnails would make sense if memory is low.