[okular] [Bug 491019] New: okular fails to open local non-home file by cmdline, but can open it by GUI navigation

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=491019

            Bug ID: 491019
           Summary: okular fails to open local non-home file by cmdline,
                    but can open it by GUI navigation
    Classification: Applications
           Product: okular
           Version: 24.05.1
          Platform: Snap
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: myocytebd at sina.com
  Target Milestone: ---

SUMMARY
(snap okular 24.05.1)
okular fails to open some local files (not under home) by cmdline, but can open
it by GUI navigation


STEPS TO REPRODUCE
Let directories be:
```
/storage (separate disk mounted on /)
/storage/Downloads (dir on disk /storage)
/_disk_home (separate disk mounted on /)
/home (separate disk; bind mount from /_disk_home)
/home/<me> (dir on /home)
/home/<me>/Downloads (symlink) -> /storage/Downloads
```
Then try to open same files by cmdline and GUI navigation.

OBSERVED RESULT
`okular /home/<me>/a.pdf`  OK;
`okular` then File->Open...->(gnome file dialog)->navigate/select: OK;

`okular /home/<me>/Downloads/b.pdf`  Fail;
`okular` then navigate: OK;

`okular /storage/Downloads/b.pdf`  Fail;
`okular` then navigate: OK;


EXPECTED RESULT
`okular /home/<me>/Downloads/b.pdf` & `okular /storage/Downloads/b.pdf` 
success


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 22.04.4 LTS
KDE Frameworks Version: 6.4
Qt Version: 6.7.1

ADDITIONAL INFORMATION
I don't understand the quirks of gnome/snap, so I don't know if it is
gnome/snap's flaw.

```
mount | grep ext4
/dev/nvme2n1p3 on / type ext4 (rw,relatime,errors=remount-ro)
/dev/nvme0n1p1 on /_disk_home type ext4 (rw,relatime,errors=remount-ro)
/dev/nvme0n1p1 on /home type ext4 (rw,relatime,errors=remount-ro)
/dev/nvme1n1p1 on /storage type ext4 (rw,relatime,errors=remount-ro)
```
```
snap connections okular
Interface                Plug                        Slot                      
     Notes
audio-playback           okular:audio-playback       :audio-playback           
     -
content[icon-themes]     okular:icon-themes         
gtk-common-themes:icon-themes   -
content[kf6-core22-all]  okular:kf6-core22           kf6-core22:kf6-core22-slot
     -
content[sound-themes]    okular:sound-themes        
gtk-common-themes:sound-themes  -
cups                     okular:cups                 cups:cups                 
     -
dbus                     -                          
okular:session-dbus-interface   -
desktop                  okular:desktop              :desktop                  
     -
desktop-legacy           okular:desktop-legacy       :desktop-legacy           
     -
home                     okular:home                 :home                     
     -
network                  okular:network              :network                  
     -
network-bind             okular:network-bind         :network-bind             
     -
opengl                   okular:opengl               :opengl                   
     -
removable-media          okular:removable-media      :removable-media          
     -
system-packages-doc      okular:system-packages-doc  :system-packages-doc      
     -
udisks2                  okular:udisks2              -                         
     -
unity7                   okular:unity7               :unity7                   
     -
wayland                  okular:wayland              :wayland                  
     -
x11                      okular:x11                  :x11                      
     -
```

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