bug#65070: 29.1; (Only on Windows) Both touchpad scroll gestures scroll the screen up and down.

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

>> Date: Sun, 20 Aug 2023 00:27:13 +0900
>> From: Kazuhiro Ito <kzhr@d1.dion.ne.jp>
>> Cc: 65070@debbugs.gnu.org,
>>      hiroya.ebine1@gmail.com,
>>      max@mal-richtig.de
>> 
>> > Is scrolling with the touchpad
>> > more smooth if you set mwheel-coalesce-scroll-events to the nil value?
>> 
>> No, as far as I tested.
>> When mwheel-coalesce-scroll-events is nil, it is very hard to
>> scrolling few lines, beacause slowly slinding fingers doesn't make
>> valid wheel event of which line count is non-zero.  It seems that
>> Emacs shows more similar behavior with other Windows applications when
>> mwheel-coalesce-scroll-events is non-nil on especially small amount
>> scrolling.
>
> Po Lu, is this expected?  Or, put it another way: how would a user set
> up Emacs for smooth scrolling when the touchpad can produce scrolling
> amounts smaller than "one scroll unit"?

By enabling pixel-scroll-precision-mode, thanks.