Description:
In LO 6.2.3.2's Impress, starting the slide show with a second screen attached shows the presenter console on screen #1, but doesn't display anything on screen #2 (unchanged, desktop background still visible).  With LO 6.1.5.2 this works as expected (slide shown on screen #2).  Also reproducible with soffice --safe-mode.

Steps to Reproduce:
Environment: Ubuntu 18.04.2 LTS (amd64), KDE 5 with Plasma 5.12.7 (as shipped with Ubuntu), LO 6.2.3.2 "Linux x86_64 (deb)" from libreoffice.org, primary screen 2560x1440, secondary screen 1920x1200 extending the desktop rightwards (reproducible with other screens / resolutions).

1. Attach secondary screen, configure X.org to extend the desktop to the right (e.g. using xrandr, arandr, ...).
2. Run soffice 6.2.3.2.
3. On start screen: Create: Impress Presentation.  Pick arbitrary template.  Open.
4. Start presentation with F5.

Actual Results:
Primary screen shows presenter console (current slide, next slide, notes).  Secondary screen doesn't show current slide but continues displaying desktop background.

Expected Results:
Presenter console on primary screen, current slide on secondary screen.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 6.2.3.2
Build ID: aecc05fe267cc68dde00352a451aa867b3b546ac
CPU threads: 8; OS: Linux 4.15; UI render: default; VCL: kde5; 
Locale: en-US (en_US.UTF-8); UI-Language: en-US
Calc: threaded