[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

I'll see what upstream has to say about a plan for v1.10 ...

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Timo Aaltonen]

reopening, as libinput got autosynced

** Changed in: libinput (Ubuntu Bionic)
   Status: Fix Released => Triaged

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Timo Aaltonen]

note that this patch does not work properly, it seems to be too
aggressive disabling hysteresis so I dropped it from Debian, see
https://bugs.debian.org/884599

** Also affects: libinput (Ubuntu Bionic)
   Importance: High
 Assignee: Daniel van Vugt (vanvugt)
   Status: Fix Released

** Bug watch added: Debian Bug tracker #884599
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=884599

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Launchpad Bug Tracker]

This bug was fixed in the package libinput - 1.9.4-1

---
libinput (1.9.4-1) unstable; urgency=medium

  * New upstream release.
  * Add fix-lp1696929.patch to fix unresponsive/laggy touchpad behaviour
caused by inappropriate use of software hysteresis (LP: #1696929).
Thanks, Daniel van Vugt!

 -- Timo Aaltonen   Thu, 14 Dec 2017 12:40:25 +0200

** Changed in: libinput (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

** Changed in: libinput (Ubuntu)
 Assignee: (unassigned) => Daniel van Vugt (vanvugt)

** Changed in: libinput (Ubuntu)
   Status: Triaged => In Progress

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

Fix for bionic attached.

Although if someone wants to make it a fix for Debian in general then
that's fine too.

** Patch added: "libinput_1.9.3-1ubuntu1.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1696929/+attachment/5021947/+files/libinput_1.9.3-1ubuntu1.debdiff

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

Correction: libinput 1.10 comes after 1.9. Expect the fix in libinput
1.10

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

Fix not actually committed to anything in Ubuntu yet. Turns out the fix
is in master, so that's probably libinput 2.0 and not 1.9 :P

** Changed in: libinput (Ubuntu)
   Status: Fix Committed => Triaged

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Sebastien Bacher]

** Changed in: libinput (Ubuntu)
   Status: Confirmed => Fix Committed

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Bug Watch Updater]

** Changed in: libinput
   Status: Confirmed => Fix Released

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

Ah, yes sorry.

I've changed the bug title again because generalizing was just asking
for trouble. There would be a never-ending stream of "me too! not
fixed!" from other users with other hardware.

** Summary changed:

- Touchpads are unresponsive and laggy
+ X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Daniel van Vugt]

Yes it sounds like Peter had already prototyped something like what I later 
suggested in
https://bugs.freedesktop.org/show_bug.cgi?id=98839#c27

However I already know that's not going to fix this problem. Fixing
hysteresis like that only solves the problem of the cursor moving in
squares when the finger is moved in circles, at most. Whereas the X1
Carbon gen4/gen5 (and possibly X1 Yoga too) require all hysteresis to be
turned _off_. This is because the hardware itself starting in gen4 has
so much hysteresis built in (firmware change?) that any additional
hysteresis in software makes it unusable. I can move my finger almost a
centimeter before the cursor moves...

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Timo Aaltonen]

test the patch from https://bugs.freedesktop.org/show_bug.cgi?id=99410

** Bug watch added: freedesktop.org Bugzilla #99410
   https://bugs.freedesktop.org/show_bug.cgi?id=99410

** Changed in: libinput (Ubuntu)
   Status: Confirmed => Incomplete

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: libinput (Ubuntu)
   Status: New => Confirmed

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Title:
  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: gnome-shell (Ubuntu)
   Status: New => Confirmed

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  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Bug Watch Updater]

** Changed in: libinput
   Status: Unknown => Confirmed

** Changed in: libinput
   Importance: Unknown => Medium

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  X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

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