Difference between revisions of "Linux Boot Logo"

Revision as of 08:02, 2 July 2009

On this page we will explain you how to change the Boot Logo/Screen of Linux.

By default the following screen is displayed on your LCD:

Create an image to suitable format (C include file)

1. create a new image fitting the size of your LCD (320x240 or 480x272), with The Gimp (for example).
2. save it in PPM RAW file format, let's say my_boot_logo.ppm
3. install Netpbm package:

   $ sudo apt-get install netpbm 

4. reduce the number of colors in your image to 224:

   $ ppmquant 224 my_boot_logo.ppm > my_boot_logo_224.ppm

5. convert it to PPM ASCII format:

   $ pnmnoraw my_boot_logo_224.ppm > my_boot_logo_ascii_224.ppm

6. get the armadeus envt variables:

   $ make shell_env && source armadeus_env.sh

7. copy the PPM to $ARMADEUS_LINUX_DIR/drivers/video/logo/ directory with a name ending with _clut224.ppm:

   $ cp my_boot_logo_ascii_224.ppm $ARMADEUS_LINUX_DIR/drivers/video/logo/logo_custom_clut224.ppm

8. Linux will automatically convert your .ppm to a .c file, after you have added it to the build system, using the $ARMADEUS_LINUX_DIR/scripts/pnmtologo script. This is the purpose of the next stage.

Add your file to Linux build system

1. If you have overwritten $ARMADEUS_LINUX_DIR/drivers/video/logo/logo_armadeus_clut224.ppm with your own logo at the previous stage, then you can jump to the following stage; otherwise:
2. Edit $ARMADEUS_LINUX_DIR/drivers/video/logo/Makefile
3. Add it your logo file name at line 16:

    obj-$(CONFIG_LOGO_ARMADEUS_CLUT224)     += logo_custom_clut224.o

4. Edit $ARMADEUS_LINUX_DIR/drivers/video/logo/logo.c
5. Add it your logo C struct name at line 36:

   extern const struct linux_logo logo_custom_clut224;
   

6. Add it your logo C struct name at line 110:

#ifdef CONFIG_LOGO_ARMADEUS_CLUT224 <br><br>        
    /* Armadeus Linux logo */
    logo = &logo_custom_clut224;
#endif

Recompile & install kernel

• Then recompile your kernel:

$ make linux26

and install it on your board.

• Restart your board and you should see your image:
  

Remove Login from framebuffer terminal

1. On your target, edit /etc/inittab
2. Comment line 28:

   #tty1::respawn:/sbin/getty 38400 tty1
   

3. save it and restart your system

Links

• Other Framebuffer tips
• http://netpbm.sourceforge.net/doc/pnmquant.html