[dolphin] [Bug 480953] New: Preview images camera-raw over smb not shown

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=480953

            Bug ID: 480953
           Summary: Preview images camera-raw over smb not shown
    Classification: Applications
           Product: dolphin
           Version: 21.12.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: view-engine: icons mode
          Assignee: dolphin-bugs-null at kde.org
          Reporter: andy at roompeach.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

Fresh install, Ubuntu 22.03, Kubuntu-Desktop. Over smb, the previews for
camera-raw (ORF, CRW, CR2..) are not shown. All possible setup/hacks/tests
failed.

Locall, the previews are generated ok, so the thumbnail-generator is working
normally. The 'don't generate over XX MiB' is of course set, all possible
values tried. I can't find the problem, as there is no log generated
(kernel.log, dmesg) 

STEPS TO REPRODUCE
1. Connect to smb over Dolphin (Proxmox Debia): everying is ok, files are
accessible
2. Open a picture folder with camera-raw files
3. There are no preview-thumbnails generated for camera-raw files (JPGs are ok)
4. When I copy any of such raw-camera file to a local folder, the previews are
visible

OBSERVED RESULT
No previews are generated in a smb folder

EXPECTED RESULT
Preview must be generated, as defined in the Settings (no 'over limit' is met)

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 22.04 + Plasma (both X11 and Wayland)
(available in About System)

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