Closed alwzying closed 5 years ago
Working on 4.18.12 (Arch) for me. From what I read it might make it into 4.20 proper
@adam-h Did you notice any issues, i.e. lag, unresponsiveness, with Linux 4.18.14 from Arch?
Nope, still looking good via USB and BT
@adam-h Thanks. I tried connecting via usb today and the trackpad indeed appears to be working as before again, the described issues via bluetooth are yet still present. I will play around with it this weekend and will report back here, if i find something.
Updated to Linux 4.18.16 on Arch Linux: the functionality is all there, if connected via bluetooth, but i have to press my finger quite harder onto the touchpad to move the cursor, compared to when connected via usb. Same as 4.18.14. Tried re-pairing the trackpad, rebuilding/reloading the module, manually adding the module, etc., but it appears only downgrading to 4.18.12 restores the functionality to where it was before.
@sydneymeyer I just tried via Bluetooth for the first time in a few weeks and notice that I also have to press harder for normal touch operations like two-finger scrolling. Kernel 4.18.16 on Arch Linux as well.
@sydneymeyer @alanorth I got the same issue on latest Arch kernel via bluetooth. I need to press almost to a click to perform any action. My setup is:
linux-zen 4.18.16.zen1-1
xf86-input-libinput 0.28.1-1
libinput 1.12.2-1
What i supposed the pressure is a key. Looks like via bluetooth connection the pressure threshold are activated. Because libinput record
register all of the touches and libinput measure touchpad-pressure
shows that the threshold is kinda 30:25 (press and release levels). So you just need to override them!
I've done that with this quirks config file:
> cat /etc/libinput/local-overrides.quirks
[Touchpad pressure override]
MatchName=*Magic Trackpad 2
AttrPressureRange=2:0
Adjust values for yourself and reboot system to apply changes.
For more you can refer to this links: https://wiki.archlinux.org/index.php/Libinput#Change_touchpad_sensitivity https://wayland.freedesktop.org/libinput/doc/latest/touchpad-pressure-debugging.html#touchpad-pressure-hwdb https://wayland.freedesktop.org/libinput/doc/latest/device-quirks.html
Also I did not test yet, but seems like usb connection ignore those thresholds.
This is right. The offsets for the pressures have been removed from the kernel-module and need now to be handled in userspace.
https://lkml.org/lkml/2018/10/3/145
Peter Hutterer:
libinput uses touch major/minor but only if a threshold is defined for that device in the quirks files (matches on VID/PID/name/...). https://gitlab.freedesktop.org/libinput/libinput/quirks/
No existing quirk will match for this device so libinput falls back to using pressure instead. That too can be defined per-device in the quirks but for this VID/PID it isn't so we fall back to the default thresholds guessed based on the pressure range (12% of the range, that's where the 30 comes from).
Adding a quirk for this device with the required major/minor threshold (or pressure if that's more reliable) should be enough to make it work, it definitely doesn't require a kernel workaround.
fwiw, testing against libinput is as simple as building the git repo with meson and running: sudo ./builddir/libinput-debug-events or if you want some graphical debugging (requires gtk3-devel) sudo ./builddir/libinput-debug-gui
Cheers, Peter
For ubuntu users, the quirks file is located in /usr/share/libinput/
@idomitori you're right, those quirks work well for me on Arch Linux kernel 4.18.16 while using the trackpad over Bluetooth. Thanks!
and in which version has it been merged into kernel