After I upgraded to ubuntu 1804 I understand that we now have to use the 2finger combo as standard. Though when playing minecraft on the go, right click is kinda essesential, and the 2finger combo don't work.
I have already earlier installed ubuntu tweak and tried to set the mouse emulation to "Area" instead of "Fingers" as everybody suggests. BUT, that don't work.
After starting Minecraft all right click stoppes working and I have to reboot in order to get Area emulation up and running again.
My laptop is a HP EliteBook Folio 1040 G3.