I try to quietly boot into a qt app on a raspberry 3 running raspian stretch. In my /boot/cmdline.txt I have
dwc_otg.lpm_enable=0 console=serial0,115200 console=tty3 root=PARTUUID=02e50ed3-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet loglevel=0 logo.nologo vt.global_cursor_default=0 splash plymouth.ignore-serial-consoles
with a custom plymouth splash screen. My qt app is started via systemctl (with WantedBy=multi-user.target in its .service file). Everything works nearly perfectly, but before my app is running, for approximately two seconds the console prompt
pi@raspberry:~/
is displayed above the plymouth splash screen. How can I remove it?