| Summary: | Apple Magic Trackpad sensitivity too low (does not detect touches unless pressing hard) | ||
|---|---|---|---|
| Product: | Wayland | Reporter: | zilla |
| Component: | libinput | Assignee: | Wayland bug list <wayland-bugs> |
| Status: | RESOLVED DUPLICATE | QA Contact: | |
| Severity: | major | ||
| Priority: | medium | CC: | daniel.van.vugt, peter.hutterer |
| Version: | unspecified | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| See Also: | https://launchpad.net/bugs/1751190 | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | evemu output | ||
Have a read of this one please: https://wayland.freedesktop.org/libinput/doc/latest/touchpad_pressure.html And then run the libinput measure touch-size tool please, thanks Did see that page and tried but I get a: => Error: device does not have ABS_MT_PRESSURE I also get the feeling that it's mostly related to tap sensitivity. Whenever I move my finger it starts selecting things. So maybe the touch sensitivity is ok but understands everything as double taps? There are two tools, 'libinput measure touchpad-pressure' and 'libinput measure touch-size'. The latter is for apple touchpads that don't have pressure, I think you ran the former? a month in needinfo, closing Bug confirmed (using libinput 1.10) now. I will collect the required information... $ sudo libinput measure touch-size Using Apple Wireless Trackpad: /dev/input/event15 Ready for recording data. Touch sizes used: 130:150 Palm size used: 800 Place a single finger on the device to measure touch size. Ctrl+C to exit Sequence: major: [ 0.. 92] minor: [ 0..148] Sequence: major: [ 0..102] minor: [ 0..156] Sequence: major: [ 0..102] minor: [ 0..168] Sequence: major: [ 0..124] minor: [ 0..200] Sequence: major: [ 0..120] minor: [ 0..192] Sequence: major: [ 0..124] minor: [ 0..204] $ sudo libinput measure touchpad-pressure Using Apple Wireless Trackpad: /dev/input/event15 Error: device does not have ABS_MT_PRESSURE Thanks. Unfortunately this isn't just a tool you can run once, you need to experiment with --touch-thresholds and --palm-threshold to figure out the right setting, it's an interactive tool. Make sure that when the thresholds are set, the 'down' and 'palm' tags show up correctly as you're interacting with the device. The --touch-thresholds option seems to always be rejected as an "unrecognized option". Can you check that it really works on your end? Regardless, what I've found is one-finger touches can be as small as size 20, and frequently 70 or lower. The existing palm size of 800 seems to work just fine. sudo ./tools/libinput-measure-touch-size --touch-thresholds 2:1 Using ELAN Touchscreen: /dev/input/event8 Ready for recording data. Touch sizes used: 2:1 Palm size used: 0 Place a single finger on the device to measure touch size. Ctrl+C to exit seems to work here? OK, that's a parsing bug 105246. Back on topic here... One-finger touches range in sizes 20-861 (yes big enough to be confused for a palm). Palm touches range in sizes 700-1100. So I recommend: --touch-thresholds 20:10 --palm-threshold 800 or even: --touch-thresholds 2:1 --palm-threshold 800 Wait a sec... this is a standalone touchpad so palm detection is generally pointless here (and also spurious per the above numbers since it can be confused for large flat fingers). So this works best: --touch-thresholds 2:1 --palm-threshold 900 or any higher value of palm-threshold, since we don't need palm detection at all. any chance you can provide a patch? given that you'd have to test any patch anyway... thanks I will gladly try patching it (whatever/wherever I don't know yet) when I have time soon. Sorry, I thought you were doing it. :) oh, come on mate. in case it wasn't obvious I'm flooded with bugs and still the only regular libinput developer. I'm the main bottleneck as-is, having me implement every trivial patch and then wait for reporter feedback (which often never arrives) doesn't help improving my efficiency. Peace. I don't mind doing it. I got the same problem. We were working on bug report #103572 (https://bugs.freedesktop.org/show_bug.cgi?id=103572). We can try to fix it here. I'm doing some test with some values in order to restore the previous behavior. I tried to use bigger values than ones used by Daniel (following what is reported by the touch-size experiments). At this moment I'm testing testing values 60:40: I'll keep it for the today. Peter, should the two values be a bit distant in order to properly detect the raise of the finger? How can be usable a 2:1 pair? Daniel, if we agree on a new official pair of values, I can prepare the patch. I don't know if you already did it but, you can test the new values on whole system (for a better feedback) changing the hwdb (see other report for some instructions). I'm used to exploit the touchpad gesture using libinput-gestures. The most tricky point for me was to restore the previous feeling with gestures. The single click or drag action are easy to restore and they works with very different range of values. Hey guys, sorry I let you down in the first place. I do read all comments but all this hardware testing is above my head. I'll happily try all patces and see if it works. Thank you very much for all your hard work, Peter. This is a great library and you're doing a trmendous job here! You caught me out to lunch, but yes I plan on fixing it today. Let's use bug 103572 since it is older. It wins :) *** This bug has been marked as a duplicate of bug 103572 *** (In reply to Daniel van Vugt from comment #18) > Let's use bug 103572 since it is older. It wins :) as a general rule please always use the more *useful* bug, not just the older one. I normally agree, but was trying to be polite to Mario. Especially since we basically know the solution in both cases. |
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Created attachment 135798 [details] evemu output After a recent update, possibly October 2017, the Apple Wireless Trackpad on my Arch Linux system doesn't work reliably anymore. It seems the sensitivity is too low because in order to somehow work with the trackpad I have to almost place my fingers flat on the trackpad and move them. Before it worked in pretty much any position even with just my fingertips touching the trackpad. I'll attach the test results below. Thank you modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.1:bd04/29/2014:svnMSI:pnMS-7924:pvr1.0:rvnMSI:rnH97M-G43(MS-7924):rvr1.0:cvnMSI:ct3:cvr1.0: udev: P: /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2.7/3-2.7:1.0/bluetooth/hci0/hci0:70/0005:05AC:030E.0007/input/input24/event20 N: input/event20 E: DEVNAME=/dev/input/event20 E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2.7/3-2.7:1.0/bluetooth/hci0/hci0:70/0005:05AC:030E.0007/input/input24/event20 E: ID_BUS=bluetooth E: ID_INPUT=1 E: ID_INPUT_HEIGHT_MM=111 E: ID_INPUT_TOUCHPAD=1 E: ID_INPUT_TOUCHPAD_INTEGRATION=external E: ID_INPUT_WIDTH_MM=132 E: LIBINPUT_ATTR_PALM_SIZE_THRESHOLD=800 E: LIBINPUT_ATTR_SIZE_HINT=130x110 E: LIBINPUT_ATTR_TOUCH_SIZE_RANGE=150:130 E: LIBINPUT_DEVICE_GROUP=5/5ac/30e:00:1a:7d:da:71:02 E: LIBINPUT_MODEL_APPLE_TOUCHPAD=1 E: MAJOR=13 E: MINOR=84 E: SUBSYSTEM=input E: USEC_INITIALIZED=353337145634 evemu output attached as file