Presentation mode in a multi-display setup on Linux (KDE/Wayland)

[b2cc]

This issue is unique.

• I have used the search tool and did not find an issue describing my bug.

Operating System

Linux (DEB package)

Version information

8.0.1.31

Expected Behavior

Possibility to select screen on which the presentation should be displayed for presentation mode and notes

Actual Behavior

Presentation opens on "wrong" screen

Reproduction Steps

• Install a Debain-Linux distribution with the KDE Plasma 5 desktop and Wayland display server
• Connect two more more displays to the computer
• Install OnlyOffice 8.x
• Run a presentation
• No possibility to select screen for presentation, presentation starts on "wrong" screen

This is a follow-up issue to #285, see my comment there: #285 (comment)

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fyi: @maruacat

Additional information

At least under KDE/Wayland, this doesn't work as intended. I have no Xorg setup anymore to test if this is Wayland-only though.

E.g. I have a 3-monitor setup, with the left monitor being turned 90° (see below). The center monitor has the highest priority, followed by the right and left monitors. However, the presentation always starts on 90°-turned left monitor. I haven't found any way to force the presentation window to another screen. Even If I make the application start on the middle or right screen, the presentation always goes to the left screen.

Thinking of how many possible configurations exist out there I believe it would be best if we had the possibility to chose the screens for the presentation and the notes before starting the presentation (e.g. displaying a small window with the detected screen layout and being able to select the screens by ourselves).