[Tutorial]: Custom boot splash screen/animation on Chrome/Chromium OS

cros_custom_splash_screen.md

Custom boot splash screen/animation on Chrome/Chromium OS

Before you start...

^{You can find tutorials about these online}

• Enable Chrome OS developer mode
• Disable root filesystem verification, remount root filesystem as read/write

Steps

• Pick a .gif image that you wish to be the boot splash animation
• Go to https://ezgif.com/split, upload the .gif file
• Select Output images in PNG format in Split options
• Click Split to frames
• Unzip the downloaded archive
• The filename of images in archive will be look like this:

frame_00_delay-0.11s.png
frame_01_delay-0.11s.png
...snip...

• Rename those images to boot_splash_frame<frame_number>.png (replace <frame_number> with the frame number listed in the filename, frame00 in the filename represent to the 1st frame, so the final name of the image will be boot_splash_frame01.png, frame01 will be boot_splash_frame02.png and so on)
• Copy those images to /usr/share/chromeos-assets/images_100_percent/, cover the original boot splash images stored there
• Open /etc/init/boot-splash.conf with vim (or your favourite command line text editor)
• Replace all --frame-interval 25 with --frame-interval <SECONDS_LISTED_IN_FILENAME * 1000> (<SECONDS_LISTED_IN_FILENAME> is the time interval listed in each image's filename (in seconds), then convert it to milliseconds (by multipling the value with 1000))
• Reboot and check out the final result :)

I think I've figured it out.

Enabling developer mode

1. Enable developer mode. Press esc + refresh + power button .

2. Press ctrl + d

3. Follow the instructions on screen to enable developer mode

If you are having trouble, find more here.

Disabling rootFS verification (IMPORTANT)!!!

1. Open up chrosh (ctrl + alt + t) and type in shell

2. Paste this command and press enter: sudo /usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions

3. Restart your computer

4. Open up chrosh (ctrl + alt + t) and type in shell

5. Paste this command and press enter: mount –o remount rw /

Getting the files for images

1. Get your images or gif, as in the original instructions above.

2. Rename those images to boot_splash_frame<frame_number>.png (replace <frame_number> with the frame number listed in the filename, frame00 in the filename represent to the 1st frame, so the final name of the image will be boot_splash_frame01.png, frame01 will be boot_splash_frame02.png and so on)

3. Copy the images until you have 30 of them

4. Be patient, yes, you will have to rename them manually. 😑

Moving the files

1. Open up chrosh again, (ctrl + alt + t) and type in shell

2. Paste this command and press enter: cd /usr/share/chromeos-assets/images_100_percent/ && sudo rm boot_splash_frame05.png boot_splash_frame09.png boot_splash_frame13.png boot_splash_frame17.png boot_splash_frame21.png boot_splash_frame25.png boot_splash_frame29.png boot_splash_frame06.png boot_splash_frame10.png boot_splash_frame14.png boot_splash_frame18.png boot_splash_frame22.png boot_splash_frame26.png boot_splash_frame30.png boot_splash_frame07.png boot_splash_frame11.png boot_splash_frame15.png boot_splash_frame19.png boot_splash_frame23.png boot_splash_frame27.png boot_splash_frame08.png boot_splash_frame12.png boot_splash_frame16.png boot_splash_frame20.png boot_splash_frame24.png boot_splash_frame28.png

3. Paste this command and press enter: cd /home/chronos/user/Downloads

4. Paste this command and press enter: sudo mv boot_splash_frame05.png boot_splash_frame09.png boot_splash_frame13.png boot_splash_frame17.png boot_splash_frame21.png boot_splash_frame25.png boot_splash_frame29.png boot_splash_frame06.png boot_splash_frame10.png boot_splash_frame14.png boot_splash_frame18.png boot_splash_frame22.png boot_splash_frame26.png boot_splash_frame30.png boot_splash_frame07.png boot_splash_frame11.png boot_splash_frame15.png boot_splash_frame19.png boot_splash_frame23.png boot_splash_frame27.png boot_splash_frame08.png boot_splash_frame12.png boot_splash_frame16.png boot_splash_frame20.png boot_splash_frame24.png boot_splash_frame28.png /usr/share/chromeos-assets/images_100_percent/

5. Reboot to apply changes

That's it! you should have your custom boot logo!

If you did have a problem or question, please mention me in a comment in this thread, I will reply sooner or later. I'm actually working on a bash script that will do the same thing. I'll say something in here when finished.

Would I need to powerwash my chromebook?

Would I need to powerwash my chromebook?

Yes, unless you are already in developer mode. Enabling developer mode has the same effect as a powerwash.

hi, i was just wondering if anyone else had the problem of this error when using crosh terminal and knew how to fix it? sudo: The "no new privileges" flag is set, which prevents sudo from running as root.
sudo: If sudo is running in a container, you may need to adjust the container configuration to disable the flag.

Thanks!

Newer chrome versions do not support sudo commands in crosh. Use the VT-2 shell (Frecon) by pressing [crtl]-[alt]-[back arrow].

…

On Sat, Mar 23, 2024 at 3:25 PM Jmole26 ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ hi, i was just wondering if anyone else had the problem of this error when using crosh terminal and knew how to fix it? sudo: The "no new privileges" flag is set, which prevents sudo from running as root. sudo: If sudo is running in a container, you may need to adjust the container configuration to disable the flag. Thanks! — Reply to this email directly, view it on GitHub <https://gist.github.com/supechicken/c57f8bb4b9dad2a29611ce05b1324b5c#gistcomment-4998828> or unsubscribe <https://github.com/notifications/unsubscribe-auth/A6URBRUBRBCFCIBC6EETIETYZX6O5BFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTCNRXGEZTENZZU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .

how do i revert back to default

how do i upload the images having probs rn