Bug 511762

Summary:	Content mime types get not used for sorting or thumbnails or preview
Product:	[Applications] dolphin	Reporter:	Otto <atztek1>
Component:	general	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	dolphin-bugs-null, kdedev
Priority:	NOR
Version First Reported In:	25.04.3
Target Milestone:	---
Platform:	Debian stable
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Otto 2025-11-07 11:08:18 UTC

Image files that have a different file extension than mime Type f.e. exempleimage.jpg with a content mime type image/webp . will not not show a thumbnail or a preview in the info panel.
In the file property the content type is correctly stated but not used to handle the file.


STEPS TO REPRODUCE
1. take a .webp and rename it with a .jpg extension.
2. the correct behavior happens when you delete the extension or the file name before the extension.
3. 

OBSERVED RESULT
 the thumbnail vanish and if you have sorted by type it jumps to another position

EXPECTED RESULT
nothing should happen

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

Comment 1 Otto 2025-11-23 09:17:45 UTC

(In reply to Otto from comment #0)
> Image files that have a different file extension than mime Type f.e.
> exempleimage.jpg with a content mime type image/webp . will not show a
> thumbnail or a preview in the info panel.
> In the file property the content type is correctly stated but not used to
> handle the file.
> 
> 
> STEPS TO REPRODUCE
> 1. take a .webp and rename it with a .jpg extension.
> 2. the correct behavior happens when you delete the extension or the file
> name before the extension.
> 3. 
> 
> OBSERVED RESULT
>  the thumbnail vanish and if you have sorted by type it jumps to another
> position
> 
> EXPECTED RESULT
> nothing should happen
> 
> SOFTWARE/OS VERSIONS
> Windows: 
> macOS: 
> (available in the Info Center app, or by running `kinfo` in a terminal
> window)
> Linux/KDE Plasma: 
> KDE Plasma Version: 
> KDE Frameworks Version: 
> Qt Version: 
> 
> ADDITIONAL INFORMATION

Comment 2 TraceyC 2026-01-08 20:28:06 UTC

Thank you for the bug report. This looks like a duplicate of bug 499241 so I'll merge this report in with the other one. Please follow that report if you would like updates on the progress of this issue.

*** This bug has been marked as a duplicate of bug 499241 ***