[okular] [Bug 506827] New: When launched with different DISPLAY or WAYLAND_DISPLAY than an existing process, should open a new instance

[Sergio]

https://bugs.kde.org/show_bug.cgi?id=506827

            Bug ID: 506827
           Summary: When launched with different DISPLAY or
                    WAYLAND_DISPLAY than an existing process, should open
                    a new instance
    Classification: Applications
           Product: okular
      Version First 25.04.2
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: sergio.callegari at gmail.com
  Target Milestone: ---

SUMMARY

When okular is launched for a document and an existing instance is running,
there is the option to open a new tab on the existing instance, rather than
launching a new instance.

However, if okular is launched with different DISPLAY or WAYLAND_DISPLAY
environment variables with respect to the existing instance, it seems logical
that the user *needs* to open a new instance.

The problem is particularly evident when using waypipe. Because of this the
reproduction case will be based on a waypipe scenario, involving two hosts, A
and B

STEPS TO REPRODUCE
1. start a KDE session on B, login and open okular to display some document.
Ensure that it is configured to open new files in tabs
2. start a session on A, connect to B with waypipe (e.g. waypipe ssh B)
3. from the waypipe session on A, open okular to display some document.

OBSERVED RESULT

A new tab opens on the okular instance running on B

EXPECTED RESULT

A new instance displayed on A via waypipe

SOFTWARE/OS VERSIONS

Operating System: Manjaro Linux 
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.3-1-MANJARO (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION

N/A

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