[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

Sebastien Bacher  changed:

   What|Removed |Added

 Status|NEEDINFO|UNCONFIRMED
 CC||seb...@ubuntu.com
 Ever confirmed|1   |0

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[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

--- Comment #5 from Daniel van Vugt  ---
fthx says he is also using tap-to-click. Is it possible some fast and precise
tapping could trick libinput into turning off hysteresis?

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[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

--- Comment #4 from fthx  ---
Here is my evemu record (Dell Precision 7510).

I experience the same bug running a SynPS/2 Synaptics touchpad of a HP 450 G3
laptop. Very noticeable when scrolling a Evince PDF (two fingers) on both Dell
& HP.

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[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

--- Comment #3 from fthx  ---
Created attachment 137105
  --> https://bugs.freedesktop.org/attachment.cgi?id=137105=edit
evemu record Dell 7510

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[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

--- Comment #2 from Daniel van Vugt  ---
Note that version 1.9.4-2ubuntu1 is just 1.9.4-2 with the fix for bug 98839
added.

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[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

Peter Hutterer  changed:

   What|Removed |Added

 Status|NEW |NEEDINFO
 CC||peter.hutte...@who-t.net

--- Comment #1 from Peter Hutterer  ---
I'll need an evemu recording of the issue please, thanks.

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[Wayland-bugs] [Bug 104828] Jumpy AlpsPS/2 ALPS DualPoint TouchPad

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104828

Bug ID: 104828
   Summary: Jumpy AlpsPS/2 ALPS DualPoint TouchPad
   Product: Wayland
   Version: unspecified
  Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
  Severity: normal
  Priority: medium
 Component: libinput
  Assignee: wayland-bugs@lists.freedesktop.org
  Reporter: grouik.gro...@yahoo.fr

Hi,

Running Ubuntu 18.04 (dev) and libinput 1.9.4-2ubuntu1 on a Dell Precision
7510.

Since the patch applied in Ubuntu (
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1696929 ) from 1.9.4-2
version, my touchpad is jumpy.

Pointing is jumpy when I need some precision (row size setting, e.g.), pointer
is jumpy (very small jumps) when I keep my finger at the same place.
Two-fingers scrolling is jumpy as well.

Daniel van Vugt says in LP bug report : "The patch in 1.9.4-2ubuntu1 is the
same as what's coming soon in libinput release 1.10. So a fix for your specific
touchpad should be done upstream. Simply reverting the patch won't help you
after we update to libinput 1.10, and besides most laptops seem to need that
patch."
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1745816

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