https://bugs.kde.org/show_bug.cgi?id=403127

            Bug ID: 403127
           Summary: Moving files across filesystems loses sub-second
                    timestamp
           Product: dolphin
           Version: 18.12.1
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-n...@kde.org
          Reporter: ad.liu....@gmail.com
                CC: elvis.angelac...@kde.org
  Target Milestone: ---

SUMMARY
In dolphin, when cut-and-paste a file from one filesystem to another, mtime is
preserved to the second, but the sub-second part is zeroed out.

STEPS TO REPRODUCE
1. 
~ $ touch a
~ $ ls --full-time a
-rw-r--r-- 1 jin users 0 2019-01-12 14:03:02.624385832 +0800 a
~ $ mv a /run/media/jin/sg10/data/
~ $ ls --full-time /run/media/jin/sg10/data/a
-rw-r--r-- 1 jin users 0 2019-01-12 14:03:02.624385832 +0800
/run/media/jin/sg10/data/a

Above shows that both filesystems (ext4) support sub-second timestamp, and mv
preserves it.

2. In dolphin, cut&paste /run/media/jin/sg10/data/a back to ~/
3. ~ $ ls --full-time a

OBSERVED RESULT
~ $ ls --full-time a
-rw-r--r-- 1 jin users 0 2019-01-12 14:03:02.000000000 +0800 a

EXPECTED RESULT
~ $ ls --full-time a
-rw-r--r-- 1 jin users 0 2019-01-12 14:03:02.624385832 +0800 a

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.53.0
Qt Version: 5.12.0

ADDITIONAL INFORMATION

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