Mészáros Máté Róbert

On Ubuntu 18.04 the Launcher does not receive a WM_CLASS even after the window is shown:

mrmeszaros@debella ~> xprop WM_CLASS WM_NAME
WM_CLASS: not found.
WM_NAME(STRING) = "Minecraft Launcher"

Hey,

I just ran into the same issue, and here is what I found:

mrmeszaros@debella ~> xprop WM_CLASS WM_NAME
WM_CLASS(STRING) = "Minecraft 1.13.2", "Minecraft 1.13.2"
WM_NAME(STRING) = "Minecraft 1.13.2"

mrmeszaros@debella ~> xprop WM_CLASS WM_NAME
WM_CLASS: not found.
WM_NAME(STRING) = "Minecraft Launcher"

A solution would be for the Launcher and Minecraft having the same WM_CLASS (window manager class) and different names.
Eg.:

WM_CLASS = "Minecraft" or "minecraft"

Do I understand correctly that the issue has to be solved in the Launcher (although it affects MC too)?