<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Lenovo Yoga X1 touchpad unprecise" href="https://bugs.freedesktop.org/show_bug.cgi?id=99410#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Lenovo Yoga X1 touchpad unprecise" href="https://bugs.freedesktop.org/show_bug.cgi?id=99410">bug 99410</a> from <a class="email" href="mailto:wilecoyote2015@gmail.com" title="bjoern <wilecoyote2015@gmail.com>"> bjoern</a> <pre>Hello, I have investigated the issue a bit further: When Evdev is used as driver instead of libinput, Issue 1 is completely gone. Issue two and three seem so be related: Using xev On each axis independently, with both libinput and evdev, on each axis a certain threshold of some millimeters must be exceeded in order to start a motion. So when the finger is resting and a slow motion is started, no changes of positions are reported to xev over the first few millimeters. Also, when moving the finger along only one axis a first and then beginning a curved motion so that there is a change of position on axis b, too, changes of axis b are only reported after the change in axis b exceeds a certain threshold. This makes it very hard to predict motion and makes the touchpad feel rather unprecise. As the previously attached image demonstrates, it is hard to conduct controlled movements. I have tried to set the Synaptics Noise Cancellation parameter to 0, 0 and the issue is gone completely. The touchpad is very precise now. Disabling the noise cancellation that way did not introduce negative side effects to me because the touchpad does not seem to be prone to input noise at all.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>