<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - double-click and drag to highlight sentences doesn't work" href="https://bugs.freedesktop.org/show_bug.cgi?id=99402#c13">Comment # 13</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - double-click and drag to highlight sentences doesn't work" href="https://bugs.freedesktop.org/show_bug.cgi?id=99402">bug 99402</a> from <a class="email" href="mailto:peter.hutterer@who-t.net" title="Peter Hutterer <peter.hutterer@who-t.net>"> Peter Hutterer</a> <pre>there's a long explanation of evdev here: <a href="http://who-t.blogspot.com.au/2016/09/understanding-evdev.html">http://who-t.blogspot.com.au/2016/09/understanding-evdev.html</a> but for this bug the summary is: BTN_LEFT is your physical button, values 1/0 are press/release. ABS_MT_TRACKING_ID is a sequential number identifying a touchpoint, so a value N means "new touch starting with sequence N", a value -1 means "touch ending". The BTN_TOOL_FINGER bit has effectively the same meaning. In your case, you can see that every time the button is pressed, you get a new touchpoint starting. When you release the button, you get the touch released. That would be normal behaviour on a clickpad but not on a touchpad with separate physical buttons. I can't verify the coordinates because you filtered them, but in the recording above they were 0/0, effectively an invalid touch. Notably though, this doesn't happen every time, the down/leave/click sequence didn't have this issue. If the 5 clicks here were just a normal click without any finger down, then it appears to only happen whenever *no* finger is down on the touchpad. If so, that's something we can hook onto. Can you verify please that: * if you have a finger down on the touchpad and you click, you only get the BTN_LEFT events but no ABS_MT_TRACKING_ID or BTN_TOOL_FINGER * if you have no fingers down, you always get the tracking id/finger events on button press release And finally: what's the event sequence when you press a button and hold it down, then put a finger on the touchpad and release the button, then release the finger. (please don't gzip the attachment it requires 5 more clicks to view)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>