<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Can't manage acceleration profile on HP 255 G5 "SynPS/2 Synaptics TouchPad"" href="https://bugs.freedesktop.org/show_bug.cgi?id=99695#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Can't manage acceleration profile on HP 255 G5 "SynPS/2 Synaptics TouchPad"" href="https://bugs.freedesktop.org/show_bug.cgi?id=99695">bug 99695</a> from <a class="email" href="mailto:giuseppemargarita@gmail.com" title="giuseppemargarita@gmail.com">giuseppemargarita@gmail.com</a> <pre>(In reply to Peter Hutterer from <a href="show_bug.cgi?id=99695#c11">comment #11</a>) > grab this branch here: > <a href="https://github.com/whot/libinput/tree/wip/touchpad-accel-debug-output">https://github.com/whot/libinput/tree/wip/touchpad-accel-debug-output</a> > > build it: > <a href="https://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html">https://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html</a> > > then run sudo ./tools/event-debug --verbose > > Move your finger on the touchpad and look at the "touch movement" message > whenever you lift a finger. What acceleration factor do you usually get? > Note that this sums up the deltas, so stick to straight lines to make it > mentally easier to map to the distance traveled. > > Also make sure that the mm distance is correct, just in case. I usually get avg factor 0.3. Sometimes 0.2 and other times 0.4. The distance traveled is quite real. The total width is about 108 mm. When I touch the edges (left or right) I get: palm: palm detected (edge) And in this case when I move the finger to the center, the pointer doesn't move: palm: palm detected (edge) button state: from BUTTON_STATE_NONE, event BUTTON_EVENT_IN_AREA to BUTTON_STATE_AREA button state: from BUTTON_STATE_AREA, event BUTTON_EVENT_UP to BUTTON_STATE_NONE event12: touch movement 0.0mm, pixels 0.0, raw px 0.0, avg factor -nan But when I touch closer to the edge and move the finger horizontally across the touchpad, the pointer moves and I get: button state: from BUTTON_STATE_AREA, event BUTTON_EVENT_UP to BUTTON_STATE_NONE event12: touch movement 100.4mm, pixels 1459.0, raw px 3951.9, avg factor 0.4 Physical width is 108 mm. "palm: palm detected (edge)" is not shown when I touch up and down edges. Moving vertically from up to down edges gives me: button state: from BUTTON_STATE_AREA, event BUTTON_EVENT_UP to BUTTON_STATE_NONE event12: touch movement 39.2mm, pixels 570.1, raw px 1542.4, avg factor 0.4 39 mm traveled, but physical height is 42 mm. These are the lines about my touchpad when I start the debug: event12: tagged as LIBINPUT_MODEL_SYNAPTICS_SERIAL_TOUCHPAD input device 'SynPS/2 Synaptics TouchPad', /dev/input/event12 is tagged by udev as: Touchpad SynPS/2 Synaptics TouchPad: using pressure-based touch detection input device 'SynPS/2 Synaptics TouchPad', /dev/input/event12 is a touchpad palm: dwt activated with SynPS/2 Synaptics TouchPad<->AT Translated Set 2 keyboard -event12 DEVICE_ADDED SynPS/2 Synaptics TouchPad seat0 default group6 cap:pg size 108x42mm tap(dl off) left scroll-nat scroll-2fg-edge dwt-on Ah, forget to mention, I have the following custom udev rules (got them from touchpad-edge-detector): # HP 255 G5 evdev:name:SynPS/2 Synaptics TouchPad:dmi:bvnInsyde:bvrF.13:bd07/21/2016:svnHewlett-Packard:pnHP255G5NotebookPC:pvrType1ProductConfigId:rvnHewlett-Packard:rn81F5:rvr66.26:cvnHewlett-Packard:ct10:cvrChassisVersion:* EVDEV_ABS_00=1349:5629:40 EVDEV_ABS_01=1098:4718:86 EVDEV_ABS_35=1349:5629:40 EVDEV_ABS_36=1098:4718:86</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>