plan9port, acme, spurious MotionNotify events problem

[Gary Capell]

I've recently noticed that scrolling in Acme (plan9port, linux) was
working strangely. xev shows that I'm now getting two MotionNotify
events after every button press. Acme then scrolls further than I
want (hitting b1 or b3 in scroll bar).

Has anyone else seen this and is there an easy fix?

[Gary Capell]

In case anyone else runs into the same problem, I worked around it by changing scrsleep() in acme/scrl.c to ignore mouse events which don't change the mouse buttons. This has the (IMO desirable) side-effect of avoiding extra scrolling if you wiggle the mouse a bit while clicking.