Some boot text still showing regardless of documented 'solutions'

Question

I am trying to remove all text from the start-up process of the RPi. I have found serveral guides explaining how to do this, and they all say relatively the same thing. Example. Here is my cmdline.txt, according to everything I can find, this should work, however I still am getting about a screens worth of lines on boot up. It should be noted there this is significantly less than what was there initially.

dwc_otg.lpm_enable=0 console=serial0,115200 console=tty3 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait loglevel=3 logo.nologo vt.global_cursor_default=0 quiet

Answer 1

A hardware solution: get an HDMI extender or switch with an on-off button, and activate it via GPIO when the Pi is fully booted.

Perhaps it could be possible to simply cut a wire in the HDMI cable which you would then reconnect with a relay. No idea which one though. Cutting the clock will disable the HDMI for sure, but I'm not certain HDMI will work well if you route the clock through a relay.

Answer 2

Anther way to remove most of the text is by enabling the splash screen sudo raspi-config then boot options then splash screen. This wont remove all text but will remove all but 20-30 lines and there is probably some way to switch the standard screen for your own if you'd like.

Answer 3

You should try adding these two options to cmdline.txt:

plymouth.ignore-serial-consoles
loglevel=0