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Re:VESA Publishes DisplayPort 2.0 Video Standard by icebraining on Thursday June 27, 2019 @03:09AM (#20292328)
Linux works fine: I use awesome as window manager and xrandr for setting up monitors, and nothing changes when I unplug HDMI or DP. The problem seems to be with Gnome/KDE/etc.
Re:VESA Publishes DisplayPort 2.0 Video Standard by Aardwolf on Thursday June 27, 2019 @08:51AM (#20293919)
Cinnamon in my case :/
Re:VESA Publishes DisplayPort 2.0 Video Standard by icebraining on Thursday June 27, 2019 @09:04AM (#20293986)
Supposedly the following command should disable that "feature":

    gsettings set org.cinnamon.settings-daemon.plugins.xrandr active false
EDIT: apparently not anymore, but there's another solution: https://github.com/linuxmint/Cinnamon/issues/6646

EDIT2: per this PR, you should be able to disable it in the configuration panel: https://github.com/linuxmint/cinnamon-settings-daemon/pull/1...