Fedora 30: no more stylish Fedora plymouth splash screen after Nividia driver installation (BIOS system)

After the driver installation for my NVidia GeForce GT 130M (legacy driver 340.xx aka-mod… version) I lost my stylish new boot Fedora 30 splash-screen. I have to use this driver, because nouveau driver for my graphics card is causing a crash of the KDE desktop. I followed the following methods:

  1. https://www.if-not-true-then-false.com/2015/fedora-nvidia-guide/2/
  2. https://askbot.fedoraproject.org/en/question/132849/desperate-help-required-for-grub-and-splash-screen-fedora-29/

Nothing helps to get back the original plymouth splash screen. I only get a grey background with three animated white squares.

Here is my original grub-file:

GRUB_TIMEOUT=5

GRUB_DISTRIBUTOR="(sed 's, release .*,g’ /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT=“console”
GRUB_CMDLINE_LINUX=“resume=/dev/mapper/luks-637c44cb-39e1-462c-a841-bc949d1b2ab6 rd.luks.uuid=luks-6f179038-2f1d-4cc8-ae75-365ff204b319 rd.luks.uuid=luks-637c44cb-39e1-462c-a841-bc949d1b2ab6 rhgb quiet”
GRUB_DISABLE_RECOVERY=“true”
GRUB_ENABLE_BLSCFG=true
GRUB_GFXPAYLOAD_LINUX=text

and here is my modified grub-file:

GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="(sed 's, release .*,g’ /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
#GRUB_TERMINAL_OUTPUT=“console”

Changed by me:

GRUB_TERMINAL_OUTPUT=gfxterm
GRUB_CMDLINE_LINUX=“resume=/dev/mapper/luks-637c44cb-39e1-462c-a841-bc949d1b2ab6 rd.luks.uuid=luks-6f179038-2f1d-4cc8-ae75-365ff204b319 rd.luks.uuid=luks-637c44cb-39e1-462c-a841-bc949d1b2ab6 rhgb quiet”
GRUB_DISABLE_RECOVERY=“true”
GRUB_ENABLE_BLSCFG=true

GRUB_GFXPAYLOAD_LINUX=text

Added by me

GRUB_GFXPAYLOAD_LINUX=keep
GRUB_GFXMODE=“1280x1024x32”

What can I do or have I to live with this minor issue? Thank you.