Windows mouse scrolling approach is to scroll per text line, not per pixel. That's why scrolling with a normal mouse wheel is usually not smooth but jumps by line(s).
The Magic Utilities use hi-dpi scrolling to achieve precise scrolling, this technique is well documented by Microsoft since Windows Vista. It sends lots of very small scroll amounts, about 100 times more than a mouse wheel, that's why scrolling is smooth and pixel precise. This works great in all web browsers and most applications.
Note: Standard Windows text components can't do smooth scrolling, that's why it's still scrolling by line, for example Notepad.
Bluetooth initialization workarounds
For technical reasons, Windows itself must enable "Smooth scrolling" when the computer starts or wakes-up from sleep. For reasons only Microsoft knows, Windows sometimes misses to send the initialization sequence on Bluetooth connections, so smooth scrolling isn't working.
On USB connections the Magic Trackpad 2 smooth scrolling always works fine.
Since version 220.127.116.11, a major release targeting this issue, the Magic Utilities provide a convenient workaround by restarting the device which doesn't affect other paired Bluetooth devices. A popup window indicates this.
- If the popup windows appears too often consider to select: Restart automatically.
- Press the button to restart the device within a few seconds.
- As an alternative you can completely disable "Smooth scrolling" in the Bluetooth driver settings.
Note: Once Windows has enabled this feature you can turn it off or back on in the user interface, but if Windows misses this important initialization step, "Smooth scrolling" it's not available at all.
Scrolling out of control
Even hi-dpi scrolling is available for more then 10 years, some software (including parts of Microsoft Office 365 and some 3D / CAD applications), count only the scroll events but ignore the small scroll amount. The result is ultra fast scrolling which is out of control.
This is a bug in these applications, not in our driver.
Disablei Smooth scrolling and set a low scroll speed to scroll like a "normal" mouse.
Web browser scrolling
If Smooth scrolling is enabled, disable smooth scrolling in your web browser, scrolling will be more responsive.
To get a better scroll experience, like momentum scrolling and better support for horizontal scrolling, we are evaluating other input methods, like direct touch input.
Too much information
Here is a comprehensive article about the complexity of Scrolling with pleasure.