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Creating GRUB/Syslinux splash images

GRUB splash image creation:
  • Open GIMP application.
  • Create an image of size 640x480 pixels. You may open an existing image and resize it too.
  • Reduce the number of colors to 14 by selecting menu item “Image->Mode->Indexed”. Don’t use any color dithering.
  • Save the resulting image as splash.xpm and close GIMP.
  • Compress the image file by running; gzip splash.xpm
  • Copy the resulting splash.xpm.gz file to /boot/grub.
  • Run update-grub to upgrade the grub configuration to include this splash image.

Syslinux splash image creation:
  • Open GIMP application.
  • Create an image of size 640x480 pixels. You may open an existing image and resize it too.
  • Reduce the number of colors to 14 by selecting menu item “Image->Mode->Indexed”. Don’t use any color dithering.
  • Save the resulting image as splash.ppm and close GIMP.
  • Install the package syslinux-common by running; apt-get install syslinux-common as sudo/root. 
  • Convert the saved image to syslinux format by running; ppmtolss16 ‘#ffffff=7’ <splash.ppm >splash.rle
  • The resulting splash.rle image can be included in /boot/syslinux and syslinux.cfg file should be edited accordingly to include this splash image.

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