Limits on kernel logo

damgar · 12-17-2009, 01:43 PM

Hi all, I was going to change the boot logo for a new kernel, I was wondering if anyone knew of any limitations on the .ppm file used for this such as size etc due to the fact that I can cut and paste an image a lot better than I can manipulate one (I really can't even color in the the lines to be quite honest).

Thanks

~sHyLoCk~ · 12-17-2009, 08:28 PM

no more than 224 colors, and 80x80px size

smeezekitty · 12-17-2009, 08:45 PM

Quote:

Originally Posted by ~sHyLoCk~

no more than 224 colors, and 80x80px size

I thought it was 16 colors and 79x79 size, guess i am an idiot.

damgar · 12-17-2009, 08:47 PM

I'm sure this is available elsewhere, but I kept finding broken links and typos and I needed something to do while my new kernel compiled!

NOTE: Changing the boot logo does require you to compile a new kernel.

1. Obtain and configure your kernel source. With a few small changes I follow the steps at http://alien.slackbook.org/dokuwiki/...[]=compile

NOTE: It is not neccessary to follow this exact order, but it makes life easier if the symbolic link below has already been set up. This is assumed below.

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linux -> linux-YOURKERNELVERSION

2. After configuring your kernel, but prior to executing

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make bzImage modules

rename the logo file that corresponds to your particular kernel configuration. This should work for the most common configurations

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mv /usr/src/linux/drivers/video/logo/logo_linux_clut224.ppm /usr/src/linux/drivers/video/logo/logo_linux_clut224.ppm.DEFAULT

3. Obtain the image you wish to use as your customized logo.

4. Open the image with a graphical editor and scale/resize the image to 80x80 pixels and save the modified file as logo.png. I chose to save it to /home.

5. Open a terminal and cd to the directory containing your new logo.png file.

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cd /home

6. Execute the following command to set the image to 224 colors and rename it. Then copy the outputted file back to /usr/src/linux/drivers/video/logo

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pngtopnm logo.png | ppmquant -fs 223 | pnmtoplainpnm > logo_linux_clut224.ppm

NOTE: the final part of this command assumes a kernel configuration that may not be yours, the output file should match the original name of the file you renamed in step 2 above, again, TO MATCH YOUR KERNEL CONFIGURATION/ARCHITECTURE.
7. If all has gone well you are now ready to return to the terminal where your configuration was taking place and resume building your kernel

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cd /usr/src/linux
make bzImage modules
make modules install

if you are following the directions from the link posted above.

damgar · 12-17-2009, 08:49 PM

LOL! I wish I'd waited for that info.......2 bad builds later! LOL

~sHyLoCk~ · 12-17-2009, 08:52 PM

cd /home shouldn't it be just cd or cd ~/

Btw I just do make -j3 as "make bzImage modules" not required. Change -j3 to your no. of CPU+1, that is how many threads to run.

I created a Slackware ppm: http://wp.me/pBvUo-5l
Regards

damgar · 12-18-2009, 12:24 AM

I'm sure there are a number of more elegant ways to do it (as well as type it up), but this worked for me. Hopefully it works for someone else as well. That is a very nice Slack ppm by the way. Thanks.