@michaa7,
What you want depends on which graphics card and driver you're using. If NVIDIA/AMD with proprietary drivers then the virtual console will stay a text mode (see note below).
In the meantime I found out the same fact with the help from guys at debianforum.de . And this is the answer of all my questions. Here on my WS I use nvidia prop. driver, on my laptop with AMD/ati I use OS driver. And when booting live.ISO, obviously it's used OS drivers.
I wasn't aware the prop. drivers don't support KMS, I even though the graphik drivers would only be loaded *shortly* befor switching to X. So I the whole time was looking for a non existing setting. It's the prop. drivers which stay in text mode as you say. And that's how I like it, but didn't know how this worked.
...
-- side note
saying "not xterm and the like VTs, but real konsole" makes your question highly confusing. konsole is KDE. VT is the kernel virtual terminal which is actually what you are asking for, so don't complain that people don't understand you. You are not making it understandable.
Thanks for clarifying this. Yes, I was confused about the terminology, and I thought VT refers to all the various terminals running in X. Now I learn VT is the one I called the "real terminal". OTOH, I made it clear that what I was looking for was to understand what causes the change form big to small fonts *during boot*, *after loding the kernel*, so, yes, my terminology was confusing, but "booting" and "loding kernel" should be clear. Anyway thanks for the side note!
--
-- another note
the resolution (i.e. your font size) changes (to small) as soon as the KMS module is loaded. This can be done by initramfs or later by init, depending on how you've configured it. I load i915 first thing in initramfs to have some consistency while booting.
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Yes, now I am aware that it was not some font setting I was searching for but to understand what causes the resoulution change. That's clear now.
You can try, as mentioned repeatedly here, using setfont (look in /usr/share/consolefonts for suggestions) and hopefully you find one that is big enough for you.
Yes, now it is clear that using non-prop. drivers I need to change fonts (which I don't with the nvidia driver).
Alternatively, you could add "nomodeset" to your kernel command line. This should prevent KMS, but then X may or may not work.
It would help if you posted which graphics card you have and which driver you intend to use.
Cheers.
Here, were I have the font size I like, I use the nvidia proprietary driver. Obviously on the same HW I have different font size when booting a live.ISO . This was the cause for my confusion, as I didn't relate it to the drivers.
Now it's clear. Thanks to you, thanks to all.