[okular] [Bug 420492] 20.04.0 significantly slows down mouse scrolling with a "hyperscroll" mouse or a touchpad driver that sends mouse wheel scroll events when configured for greater speed

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=420492

--- Comment #8 from Nate Graham <nate at kde.org> ---
(In reply to David Hurka from comment #7)
> (In reply to Keziolio from comment #5)
> > this is the reason we don't have the inertial
> > scrolling on touchpad;
> 
> What do you mean? My Okular from git master always supported inertial
> scrolling with the touchpad. You just need to enable it in System Settings.
You must be using the Synaptics driver. With this older driver, inertial
scrolling can be provided by the driver itself sending scroll events with some
falloff. When using the successor Libinput driver (which seems to be installed
by default in most distros these days), inertial scrolling is not a driver
feature and must be handled by the toolkit or application.

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