DEBIX Modify Boot Logo

·Board: DEBIX Model A

·System: ubuntu22.04

·Kernel source code: https://github.com/debix-tech/linux

1. Download the kernel source code from above Github website

git clone --depth=1 https://github.com/debix-tech/linux

2. Prepare .ppm logo file

·Convert png image to ppm file

pngtopnm <input.png> ><output.pnm>

·Convert a picture to 224 colours

ppmquant 224 <input.pnm> > <output.pnm>

·Convert the 224-colour image to an ASCII binary file

pnmtoplainpnm <input.pnm> > <output.ppm>

·Finally view the file format via file <name.ppm>, the file format is: "Netpbm image data, size = * X *, pixmap, ASCII text ".

3. Replace the logo file

DEBIX kernel logo location is: drivers/video/logo/logo_linux_clut224.ppm 

Replace the logo: rename the prepared logo.pmm to logo_linux_clut224.ppm

mv logo.pmm logo_linux_clut224.pmm

cp logo_linux_clut224.pmm ./linux-debix/drivers/video/logo/logo_linux_clut224.ppm

4. Replace the Image file

·Recompile the kernel

make -j4