On Sun, 28 Oct 2018, Linus Torvalds wrote:

So I use a Logitech MX Anywhere 2S mouse, and really like it. I have
the scroll-wheel unlocked, because I like flicking once to scroll a
lot.

However, the new high-res scroll code means that the scroll wheel
action is now much too sensitive. It's not even stable - it will
scroll back-and-forth a bit occasionally, and in fact it sometimes
seems to scroll not because I touch the scroll-wheel, but because the
movement of the mouse itself causes the scroll wheel to move slightly
and wiggle the scroll action.

So the recent change to enable the high-res scrolling really seems a
bit *too* extreme.

Is there some middle ground that turns the mouse from "look at it
sideways and it starts scrolling" to something slightly more
reasonable?

Benjamin indicated that Peter probably has found the issue in the code 
(failure to properly reset on direction change) that might be causing 
this. Adding to CC.

Peter?

Thanks,

-- 
Jiri Kosina
SUSE Labs