systemd.debug-shell=1 as kernel parameter kind of works: I can switch via Alt+F9 to a shell when systemd boot hangs.
But this shell is quite impossible because an animated
[ *** ] A start job is running for Create Volatile Files and Directories (4min 23s / no limit)
banner is destroying my prompt and command line output.
Thus, my question: how do I disable this obstructing systemd output in my shell tty9?
I'm ok with it being displayed in tty1, i.e. the main console - but as-is, it makes the systemd debug shell unusable.
This is the systemd under Fedora 29.