[dolphin] [Bug 486679] New: Dolphin Suddenly Lost Media Type (Formerly MIME Type) Association on Its Own

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https://bugs.kde.org/show_bug.cgi?id=486679

            Bug ID: 486679
           Summary: Dolphin Suddenly Lost Media Type (Formerly MIME Type)
                    Association on Its Own
    Classification: Applications
           Product: dolphin
           Version: 24.02.2
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: bugreporting at mailna.me
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 169246
  --> https://bugs.kde.org/attachment.cgi?id=169246&action=edit
Dolphin lost file association annotated screenshot

SUMMARY
***
Two things happened without user intervention:
1. Dolphin suddenly, for unknown reason, lost file association and it cannot be
re-associated via right click, i.e:
2. Settings in Dolphin (right click) do not work to re-apply the system-wide
MIME Type/Media Type association, despite "associated" program being there in
the list.

STEPS TO REPRODUCE / OBSERVED RESULT
My example here is "afile.mp4", where I noticed this behavior (might be after
recent KDE update).

1. Open Dolphin
2. Click on any "video.mp4" file in Dolphin (file is correct type and has
correct extension).
3. Nothing happens (suddenly after update, where previously all worked on the
same file)
Then try to fix the lost file association:
4. Right click on the "video.mp4" file and chose "Properties"
5. Chose "Open With >> Change..." (because suddenly NOTHING was associated with
this file type)
6. The associated software (here SMPlayer as an example) is in the list (just
like before update) along with mpv, vlc,.. in the list. Nothing has changed.
But it doesn't work anymore. Click "OK"
7. File "something.mp4" is not associated. Association with the corresponding
file type also stopped working.

To be precise: the corresponding settings in system-wide settings to set MIME
Type/Media type do still work.


EXPECTED RESULT
Whatever happened in new Dolphin update, it has media type/mime type
association broken and needs to be thoroughly examined. It also is not
corresponding to system-wide settings where media type re-association worked.
Expected: Reverting changes in Dolphin so it does not loose mime type/media
type association out of the blue and fixing right click association in Dolphin
to work as before (just like they work in system-wide settings).

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
Graphics Platform: X11
Graphics Processor: Mesa Intel HD

ADDITIONAL INFORMATION
dolphin 24.02.2-2

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