[dolphin] [Bug 412886] New: image thumbnails: many don't show

[Lance Haverkamp]

https://bugs.kde.org/show_bug.cgi?id=412886

            Bug ID: 412886
           Summary: image thumbnails: many don't show
           Product: dolphin
           Version: 19.08.2
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: view-engine: icons mode
          Assignee: dolphin-bugs-null at kde.org
          Reporter: Lance at TheHaverkamps.net
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 123167
  --> https://bugs.kde.org/attachment.cgi?id=123167&action=edit
screenshot of small directory containg a few jpg's

SUMMARY
On both the Desktop and in Dolphin, some images do thumbnail, while others do
not. They're not different file-types:
Some jpgs thumbnail, while other jpgs in the exact same directory don't.
Some pngs thumbnail, while other pngs in the exact same directory don't.
There isn't a big difference in file size, so that shouldn't be the issue.

STEPS TO REPRODUCE
1. Open Dolphin to any directory containing images, or just look at the Desktop
if it has images.


OBSERVED RESULT
most jpg's and png's are not thumnailed, the theme icon represents most images
in most directories

EXPECTED RESULT
Thumbnails 

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE-Neon Version 5.16.5


ADDITIONAL INFORMATION

This was a recent install of KDE-Neon within the last month or two.  Re-naming
an image (not the filetype, just the name) will often allow SOME of the images
in that directory to be displayed--but usually not all--even of the same type
(jpg for example).  
This is not a networking issue--these are local folders & files in the user's
home directory.

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