I am facing a problem of displaying early in boot the Kernel boot logo on Kernel 5.10.168-ti-r73 from the Monthly Snapshot images from 2023-10-07 on both Debian 11 and Debian 12. Connected is a TFT display ILI931 in uEnv.txt, and also to speedup the boot process I disabled all unnecessary virtual capes too:
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
I this configuration the display power up in Bookworm 12.x after 42 seconds, way to late after loading the Kernel. I am expecting to see a Kernel logo after 11 seconds in this case. Also the Kernel logo is not displayed, only black screen.
Startup finished in 11.012s (kernel) + 32.928s (userspace) = 43.940s
graphical.target reached after 32.477s in userspace.
The same configuration in Debian Bullseye 11.x image preform somehow better for the same Kernel 5.10.168-ti-r73 and power up the TFT screen after 30 seconds, but also don’t show the Kernel logo image.
Startup finished in 9.758s (kernel) + 19.313s (userspace) = 29.072s
graphical.target reached after 18.825s in userspace
Furthermore the output from
systemd-analyze for reaching
graphical.target after 18.825s is kind of strange.
My question is why is powering of the display so late in the boot process, and way the boot logo is not shown, but only black display? I also disable getty@tty1 to not overlap the Kernel Logo.
Is there a way to move the screen initialisation in some early boot stage? Is there a better way to show a custom logo early on powering the BBB for example over U-Boot?