Re: [PATCH 2/2] Revert "fbcon: Disable accelerated scrolling"

[Linus Torvalds]

On Wed, Jan 19, 2022 at 2:29 PM Helge Deller <deller@xxxxxx> wrote:
>
> >>
> >> Ah, no, that was just the soft scrollback code I was thinking of, which
>
> Right.
> That was commit 973c096f6a85 and it was about vgacon, not fbcon.

No, fbcon had some bug too, although I've paged out the details. See
commit 50145474f6ef ("fbcon: remove soft scrollback code").

If I remember correctly (and it's entirely possible that I don't), the
whole "softback_lines" logic had serious problems with resizing the
console (or maybe changing the font size).

There may have been some other bad interaction with
foreground/background consoles too, I forget.

       Linus