Replacing the Linux logo with your own Logo

1 Create your own logo file

Create your logo in a .png format (logo.png), and run the following to convert it to a 224 colors PPM formatted image file named logo_linux_clut224.ppm :

 

2 Convert your logo file to PPM format

You needed to install netpbm and after that execute this steps:

$ sudo apt-get install netpbm

once you installed, follow below steps,

sarathkumar@Sarathkumar-RND:~/yocto_kernel_BBB/logo$ convert logo.png temp.ppm

sarathkumar@Sarathkumar-RND:~/yocto_kernel_BBB/logo$ ppmquant 224 temp.ppm > 

temp1.ppm 

ppmquant: making histogram...

ppmquant: 4251 colors found

ppmquant: choosing 224 colors...

ppmquant: mapping image to new colors...

sarathkumar@Sarathkumar-RND:~/yocto_kernel_BBB/logo$ pnmnoraw temp1.ppm > logo_linux_clut224.ppm

Steps:

$ convert logo.png temp.ppm
$ ppmquant 224 temp.ppm > temp1.ppm
$ pnmnoraw temp1.ppm > logo_linux_clut224.ppm 

Your own logo ready now. logo_linux_clut224.ppm is replacing exiting Linux penguin logo.

3 Replace the default logo file in the Linux source

Using the Linux source code directly

Follow the "Build Linux from source code" guide to get the Linux kernel source tree.

Copy your logo_linux_clut224.ppm file to {kernel_source}/drivers/video/logo/logo_linux_clut224.ppm overwriting the original logo.

Configure your kernel and enable the default logo instead of the your logo: Device Drivers -> Graphics support -> Bootup logo -> Standard 224-color Linux logo (Symbol: LOGO_LINUX_CLUT224)

Now you can build the kernel source and try to boot your kernel with newly compiled image with your own logo.

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If you want to create a different configuration for your own logo rather than overwriting the default one,  

follow below steps,

1.Edit : {kernel_source}/drivers/video/logo/Kconfig

config LOGO_CUSTOM_CLUT224                    bool  "224-color Variscite Linux logo"                      default y /*  add above three lines before endif # LOGO of the file   */ 2. Edit : {kernel_source}/drivers/video/logo/Makefile obj-$(CONFIG_LOGO_SUPERH_CLUT224) += logo_superh_clut224.o             obj-$(CONFIG_LOGO_CUSTOM_CLUT224) += logo_custom_clut224.o obj-$(CONFIG_LOGO_M32R_CLUT224)+= logo_m32r_clut224.o /*  insert the above green color line between those two lines of this file   */ 3. Edit : {kernel_source}/drivers/video/logo/logo.c #ifdef CONFIG_LOGO_SUPERH_CLUT224 /* SuperH Linux logo */ logo = &logo_superh_clut224; #endif  #ifdef CONFIG_LOGO_CUSTOM_CLUT224    /* Custom Linux logo */    logo = &logo_custom_clut224;  #endif #ifdef CONFIG_LOGO_M32R_CLUT224 /* M32R Linux logo */ logo = &logo_m32r_clut224; #endif /*  insert the above green color lines  in-between those           colour section of t, this file   */ 4. Edit : {kernel_source}/include/linux/linux_logo.h extern const struct linux_logo logo_spe_clut224;            extern const struct linux_logo logo_custome_clut224; /*  insert the above green color line below that         colour  lines of this file   */ 5. Rename the Logo file  :       rename the newly create logo file name from logo_linux_clut224.ppm  to   logo_custom_clut224.ppm Configure your kernel and enable the your custom logo instead of the Linux logo: Device Drivers -> Graphics support -> Bootup logo -> Standard 224-color Linux logo (Symbol: LOGO_CUSTOM_CLUT224).