No video output if top of primary monitor is below top of secondary monitor

[roothorick]

Area where video should be is, depending on the video output mode selected: a darkened VLC logo, a copy of the bottom toolbar in the top left corner, or just plain black. Resizing the window causes the toolbar to "ghost" on top of where the video should be.

Exact monitor configuration if needed (xrandr CLI): --dpi 192 \
   --output DP-0 --mode 1920x1080 --pos 3840x0 --rotate left --scale 2x2 \
   --output DP-2 --mode 3840x2160 --pos 0x1288

Changing the last position flag to 0x0 "fixes" the problem at the cost of cursor position being "wrong" when transitioning between monitors.

OBS has a very similar issue, see here: https://bugs.launchpad.net/bugs/1876612

Which makes me think it may in fact be a Qt bug.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: vlc 3.0.9.2-1
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
Date: Tue Jun 9 17:55:37 2020
InstallationDate: Installed on 2020-05-03 (37 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no username)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: vlc
UpgradeStatus: No upgrade log present (probably fresh install)