@swamprock, how did you get that graphical boot screen in Sid working on your iBook? That would be a great addition to the Wiki and countless already installed systems.
And quick question, are your PowerBook's backlit keys still misbehaving in Sid, or was some kind of fix found?
Thanks.
sudo apt install plymouth plymouth-themes
/usr/sbin/plymouth-set-default-theme --list
/usr/sbin/plymouth-set-default-theme THEME_NAME
sudo nano /etc/yaboot.conf
append="quiet splash" (after any other appended commands, like radeon.agpmode=-1)
Save and exit nano, then sudo ybin -v
Reboot
Seems to only work with Radeon cards, though, due to nvidia firmware weirdness in Debian 10+. There may be some themes that don't work, so keep trying.
And yeah... I still get stuttering in Debian 10 with i2s_bus enabled in modules.