Re: Set-window-vscroll sometimes doesn't work

[Yuan Fu]

> On Oct 22, 2020, at 1:09 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Thu, 22 Oct 2020 12:50:23 -0400
>> Cc: help-gnu-emacs@gnu.org
>> 
>> What do you mean by "smooth scrolling" here?  If I invoke C-2 C-n" on
>> a large image, the image gets scrolled by the amount of pixels that is
>> equivalent to 2 screen lines.  Isn't that what you see?
>> 
>> With emacs -Q? On my machine emacs -Q doesn’t to that. Instead of moving two 
>> line’s height, it just jumps
>> to the next logical line.
> 
> That can only happen if the image fits in the window in its entirety.
> Enlarge it so it's taller than the window, and then try again.

In the video I first pressed C-n a couple times, then C-u 2 C-n. It really 
doesn’t smooth scroll here (I’m on master).

Yuan