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Custom boot logo on a T470/T480/...

Source: Reddit

Make a BIOS update that contains the new logo

  • First we need the BIOS upadate utility ISO file from the Lenovo site.
    Set your model and set the filter for components -> BIOS/UEFI.
    Go to the entry that says (Utility & Bootable CD) and download the BIOS Update (Bootable CD)
  • Then extract the iso with geteltorito -o bios.img n24ur09w.iso
  • And write it to a USB stick sudo dd if=bios.img of=/dev/sdX bs=4M
  • Mount the stick and copy the image to FLASH/LOGO.JPG, FLASH/LOGO.GIF, or FLASH/LOGO.BMP (write everything in capital letters)
  • If you already have the latest BIOS version installed, you'll need to turn off the BIOS setting for preventing downgrades, as it seems to also prevent re-flashing the same version.
  • Boot from the stick and make the BIOS update

Make a logo image

You can use mine. I created it from the same logo as my plymout theme (arch-beat )
It will look like that:

Or you can create your own with GIMP. The image gets displayed centered in the upper portion of the screen (see Reddit post for more details)

  • image has to be <60KB
  • turn off "Progressive" and all of the "Save ___ data" checkboxes
  • set the subsampling to 4:2:0
  • "Optimize" can be enabled
  • DCT method can be integer.