<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - AlpsPS/2 ALPS DualPoint TouchPad scrolling is jumpy" href="https://bugs.freedesktop.org/show_bug.cgi?id=90990#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - AlpsPS/2 ALPS DualPoint TouchPad scrolling is jumpy" href="https://bugs.freedesktop.org/show_bug.cgi?id=90990">bug 90990</a> from <a class="email" href="mailto:peter.hutterer@who-t.net" title="Peter Hutterer <peter.hutterer@who-t.net>"> Peter Hutterer</a> <pre>ok, afaict what's happening here is that you set the finger down, then move it and edge scrolling doesn't trigger until you pass the built-in motion threshold (5mm). When you pass it, the first scroll event includes the full motion so far but it's accelerated too which causes that massive jump. I guess that leaves three options: * reduce the initial threshold, but would likely cause the same jump even at 3mm and I don't want to go below that * don't release the full distance but just the last delta when we hit the threshold. this would add a dead zone to scrolling * replay the motion history in full once the threshold is hit. this would only add a slight delay to scrolling</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>