In my logs I see hundreds of lines of the form: 2023-03-08T14:03:16.616801+01:00 twentytwo plasmashell[21808]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type "image/x-aptus-mos" 2023-03-08T14:03:16.616874+01:00 twentytwo plasmashell[21808]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type "image/x-arq" 2023-03-08T14:03:16.616903+01:00 twentytwo plasmashell[21808]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type "image/x-bay" 2023-03-08T14:03:16.616921+01:00 twentytwo plasmashell[21808]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type "image/x-bmq" 2023-03-08T14:03:16.616938+01:00 twentytwo plasmashell[21808]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type "image/x-cap" 2023-03-08T14:03:16.616955+01:00 twentytwo plasmashell[21808]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type "image/x-cine" … If this is harmless, please add appropriate logcheck entries to filter them out, e.g.: plasmashell\[.*\]: org.kde.kdegraphics.gwenview.lib: Unresolved mime type \".*/.*\" plasmashell\[.*\]: org.kde.kdegraphics.gwenview.lib: Unresolved raw mime type \".*\/.*\"