[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

Regardless, this bug is closed. If you have any new problems with
xserver-xorg-input-synaptics installed then please open a new bug by
running:

  ubuntu-bug xserver-xorg-input-synaptics

Otherwise please run:

  ubuntu-bug libinput

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  Touchpads are unresponsive and laggy for small finger movements

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Dan Dascalescu]

Actually my issue is much closer to bug 1791427 (comment #62).

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Dan Dascalescu]

I see a much worse version of this problem on my brand new ThinkPad X1
Carbon 6th gen: the mouse cursor moves/clicks only about 5% of the time
I use the touchpad. The Trackpoint doesn't work at all. Installing
Ubuntu was a keyboard-only affair, and I hoped that some updates would
fix this dealbreaker issue. In Ubuntu Budgie 18.04, the mouse worked
fine after the DE started up, but was frozen during the startup for ~30
seconds. So this isn't a hardware problem.

I've already installed xserver-xorg-input-synaptics and rebooted - no
luck.

What else can I try? The mouse responds normally but only ~5% of the
time I use the touchpad (move cursor, or tap/click).

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  Touchpads are unresponsive and laggy for small finger movements

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Bug Watch Updater]

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

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

Yes, upstream reopened this bug because it regressed. I'm not sure how
we want to handle that in Launchpad.

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Bug Watch Updater]

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

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Launchpad Bug Tracker]

This bug was fixed in the package libinput - 1.9.4-2ubuntu1

---
libinput (1.9.4-2ubuntu1) bionic; urgency=medium

  * Restore and refresh fix-lp1696929.patch to fix unresponsive/laggy touchpad
behaviour caused by inappropriate use of software hysteresis (LP: #1696929)
This time the patch includes the fix for Debian bug #884599.

 -- Daniel van Vugt   Mon, 22 Jan 2018
16:18:09 +0800

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

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

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

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Timo Aaltonen]

uploaded, stuck in the queue like everything else

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

A fresh fix for bionic, that should satisfy everyone now.

** Patch added: "libinput_1.9.4-2ubuntu1.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1696929/+attachment/5040905/+files/libinput_1.9.4-2ubuntu1.debdiff

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  Touchpads are unresponsive and laggy for small finger movements

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

** Description changed:

  Some laptop touchpads are annoyingly unresponsive when the software
  implements any kind of hysteresis. This is a regression caused by the
  introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and
  5, Dell XPS 13, and Apple Macbook Air.
  
  WORKAROUND (1)
  
  1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg.
  2. sudo apt install xserver-xorg-input-synaptics
  3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more). For example:
-synclient HorizHysteresis=0 VertHysteresis=0
+    synclient HorizHysteresis=0 VertHysteresis=0
  
  WORKAROUND (2)
  
  1. Downgrade to version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
  That version contained the fix for this bug, briefly.
+ 
+ RELEVANT UPSTREAM BUGS ABOUT THE SAME ISSUE:
+ https://bugs.freedesktop.org/show_bug.cgi?id=98839
+ https://bugs.freedesktop.org/show_bug.cgi?id=101428
+ https://bugs.freedesktop.org/show_bug.cgi?id=100752
+ https://bugs.freedesktop.org/show_bug.cgi?id=104470
+ https://bugs.freedesktop.org/show_bug.cgi?id=103619
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: libinput10 1.6.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
  Uname: Linux 4.10.0-22-generic x86_64
  ApportVersion: 2.20.5-0ubuntu4
  Architecture: amd64
  Date: Fri Jun  9 14:52:18 2017
  InstallationDate: Installed on 2017-06-08 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
  SourcePackage: libinput
  UpgradeStatus: No upgrade log present (probably fresh install)

** Description changed:

- Some laptop touchpads are annoyingly unresponsive when the software
- implements any kind of hysteresis. This is a regression caused by the
- introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and
- 5, Dell XPS 13, and Apple Macbook Air.
+ Touchpads are unresponsive and laggy for small finger movements. This is
+ a regression caused by the introduction of libinput, visible on at least
+ Lenovo X1 Carbon gen 4 and 5, Dell XPS 13, and Apple Macbook Air.
  
  WORKAROUND (1)
  
  1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg.
  2. sudo apt install xserver-xorg-input-synaptics
  3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more). For example:
     synclient HorizHysteresis=0 VertHysteresis=0
  
  WORKAROUND (2)
  
  1. Downgrade to version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
  That version contained the fix for this bug, briefly.
  
  RELEVANT UPSTREAM BUGS ABOUT THE SAME ISSUE:
  https://bugs.freedesktop.org/show_bug.cgi?id=98839
  https://bugs.freedesktop.org/show_bug.cgi?id=101428
  https://bugs.freedesktop.org/show_bug.cgi?id=100752
  https://bugs.freedesktop.org/show_bug.cgi?id=104470
  https://bugs.freedesktop.org/show_bug.cgi?id=103619
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: libinput10 1.6.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
  Uname: Linux 4.10.0-22-generic x86_64
  ApportVersion: 2.20.5-0ubuntu4
  Architecture: amd64
  Date: Fri Jun  9 14:52:18 2017
  InstallationDate: Installed on 2017-06-08 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
  SourcePackage: libinput
  UpgradeStatus: No upgrade log present (probably fresh install)

** Description changed:

  Touchpads are unresponsive and laggy for small finger movements. This is
  a regression caused by the introduction of libinput, visible on at least
  Lenovo X1 Carbon gen 4 and 5, Dell XPS 13, and Apple Macbook Air.
  
  WORKAROUND (1)
  
  1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg.
  2. sudo apt install xserver-xorg-input-synaptics
  3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more). For example:
     synclient HorizHysteresis=0 VertHysteresis=0
  
  WORKAROUND (2)
  
  1. Downgrade to version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
  That version contained the fix for this bug, briefly.
  
  RELEVANT UPSTREAM BUGS ABOUT THE SAME ISSUE:
+ 
  https://bugs.freedesktop.org/show_bug.cgi?id=98839
  https://bugs.freedesktop.org/show_bug.cgi?id=101428
  https://bugs.freedesktop.org/show_bug.cgi?id=100752
  https://bugs.freedesktop.org/show_bug.cgi?id=104470
  https://bugs.freedesktop.org/show_bug.cgi?id=103619
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: libinput10 1.6.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
  Uname: Linux 4.10.0-22-generic x86_64
  ApportVersion: 2.20.5-0ubuntu4
  Architecture: amd64
  Date: Fri Jun  9 14:52:18 2017
  InstallationDate: Installed on 2017-06-08 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
  SourcePackage: libinput
  

[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

Actually we don't need to ignore it. We can release the fixes for the
regression. The fixes are:

1. libinput: 
https://lists.freedesktop.org/archives/wayland-devel/2018-January/036475.html 
(not landed yet)
2. kernel: https://bugs.freedesktop.org/show_bug.cgi?id=104533 (not tested yet)

James will need both, but as I understand it only the libinput fix is
required for all touchpads in general. So we only need to wait for #1. I
plan on testing it across a few laptops this week to get ahead of the
ball.

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Timo Aaltonen]

I don't understand how we can ignore a well known regression? If there's
a kernel patch as a result then surely we'll want it in bionic?

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

Actually we may be blocked waiting to see if the first fix for James'
issue lands:

https://lists.freedesktop.org/archives/wayland-
devel/2018-January/036475.html

We should include that if it does.

The second fix for James' issue we can ignore providing it stays a
kernel problem:

https://bugs.freedesktop.org/show_bug.cgi?id=104533

** Bug watch added: freedesktop.org Bugzilla #104533
   https://bugs.freedesktop.org/show_bug.cgi?id=104533

** Description changed:

  Some laptop touchpads are annoyingly unresponsive when the software
  implements any kind of hysteresis. This is a regression caused by the
  introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and
  5, Dell XPS 13, and Apple Macbook Air.
  
  WORKAROUND (1)
  
  1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg.
  2. sudo apt install xserver-xorg-input-synaptics
- 3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more).
+ 3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more). For example:
+synclient HorizHysteresis=0 VertHysteresis=0
  
  WORKAROUND (2)
  
  1. Downgrade to version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
  That version contained the fix for this bug, briefly.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: libinput10 1.6.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
  Uname: Linux 4.10.0-22-generic x86_64
  ApportVersion: 2.20.5-0ubuntu4
  Architecture: amd64
  Date: Fri Jun  9 14:52:18 2017
  InstallationDate: Installed on 2017-06-08 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
  SourcePackage: libinput
  UpgradeStatus: No upgrade log present (probably fresh install)

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Title:
  Touchpads are unresponsive and laggy for small finger movements

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy for small finger movements

[Daniel van Vugt]

** Summary changed:

- Touchpads are unresponsive and laggy
+ Touchpads are unresponsive and laggy for small finger movements

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  Touchpads are unresponsive and laggy for small finger movements

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Daniel van Vugt]

** Description changed:

  Some laptop touchpads are annoyingly unresponsive when the software
- implements any kind of hysteresis. This includes Lenovo X1 Carbon gen 4
- and 5. Such devices have lower precision and higher lag in the touchpad
- hardware than you might expect, so need the software to not slow them
- down further.
+ implements any kind of hysteresis. This is a regression caused by the
+ introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and
+ 5, Dell XPS 13, and Apple Macbook Air.
  
- The problem now is that using libinput by default slows down all
- touchpads and makes them less precise. For hardware that was already
- unresponsive, introducing software that further reduces the
- responsiveness is very frustrating, borderline unusable.
+ WORKAROUND (1)
  
- When we were using Xorg the simple solution was to adjust hysteresis
- with 'synclient'. However now we're using Wayland we're stuck with
- libinput and I don't know how to fix it any more. Even Xorg logins seem
- to use libinput now, so there's no 'synclient' workaround available
- there anymore either.
+ 1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg.
+ 2. sudo apt install xserver-xorg-input-synaptics
+ 3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more).
+ 
+ WORKAROUND (2)
+ 
+ 1. Download and install the exact version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
+ That version contained the fix for this bug, briefly.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: libinput10 1.6.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
  Uname: Linux 4.10.0-22-generic x86_64
  ApportVersion: 2.20.5-0ubuntu4
  Architecture: amd64
  Date: Fri Jun  9 14:52:18 2017
  InstallationDate: Installed on 2017-06-08 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
  SourcePackage: libinput
  UpgradeStatus: No upgrade log present (probably fresh install)

** Description changed:

  Some laptop touchpads are annoyingly unresponsive when the software
  implements any kind of hysteresis. This is a regression caused by the
  introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and
  5, Dell XPS 13, and Apple Macbook Air.
  
  WORKAROUND (1)
  
  1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg.
  2. sudo apt install xserver-xorg-input-synaptics
  3. Tweak your personal preferences using 'synclient' (the GUI settings won't 
work any more).
  
  WORKAROUND (2)
  
- 1. Download and install the exact version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
+ 1. Downgrade to version 1.9.4-1 of libinput: 
https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729
  That version contained the fix for this bug, briefly.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: libinput10 1.6.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
  Uname: Linux 4.10.0-22-generic x86_64
  ApportVersion: 2.20.5-0ubuntu4
  Architecture: amd64
  Date: Fri Jun  9 14:52:18 2017
  InstallationDate: Installed on 2017-06-08 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
  SourcePackage: libinput
  UpgradeStatus: No upgrade log present (probably fresh install)

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  Touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Daniel van Vugt]

Timo,

Any chance we could patch this for bionic only? No need to wait for
libinput release 1.10. Just take the fixes that are in the master branch
already and backport.

That would avoid clashing with James using Debian. Actually in general I
think many more people will need the fix than the status quo. It would
be very bad if the LTS went out without this fixed. A dramatic step
backwards for lots of people. And many of them won't know it's coming
until they do their LTS upgrade.

In my mind this libinput fix is more important than just about
everything else graphical and interactive because without it, the
desktop is just too frustrating to use. And worse, the primary
workaround for this bug is to revert to Xorg+synaptics, so we also lose
the dream of being able to stay in Wayland.

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Daniel van Vugt]

Generalised the bug title again. I now realise other common machines
like the Dell XPS 13 and Macbook Air 13 experience this same bug. In all
cases I have to revert to a Xorg session and installing xserver-xorg-
input-synaptics to be able to use the touchpad adequately.

** Summary changed:

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

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https://bugs.launchpad.net/bugs/1696929

Title:
  Touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Timo Aaltonen]

intel hasn't been the default driver since 16.10, modesetting is (on
gen4 and up)

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https://bugs.launchpad.net/bugs/1696929

Title:
  Touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Daniel van Vugt]

Workaround:

1. sudo apt install xserver-xorg-input-synaptics
2. Log out
3. On the login screen select session "Ubuntu on Xorg"
4. After logging in, disable hysteresis:
   synclient HorizHysteresis=0 VertHysteresis=0

This won't cure laggy hardware but it will at least eliminate the
software lag in touchpad response.

Next, since you're now using Xorg and not Wayland, you likely are also
using the Intel graphics driver for Xorg. The intel xorg graphics driver
is also laggier than Wayland by default (by one frame or ~16.6ms). You
can fix that by creating a /etc/X11/xorg.conf with:

Section "Device"
  Identifier "MyLaptop"
  Driver "intel"
  Option "TripleBuffer" "off"
EndSection

Although this does risk hurting the framerate smoothness of gnome-shell
while it is still relatively young and un-optimized, you can choose
between smoother graphics ("TripleBuffer" "on") or lower latency
("TripleBuffer" "off").

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https://bugs.launchpad.net/bugs/1696929

Title:
  Touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Daniel van Vugt]

Don't forget to also 'chmod 644 /etc/X11/xorg.conf' or else logging in
may fail.

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https://bugs.launchpad.net/bugs/1696929

Title:
  Touchpads are unresponsive and laggy

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[Ubuntu-x-swat] [Bug 1696929] Re: Touchpads are unresponsive and laggy

[Daniel van Vugt]

** Summary changed:

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

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

** No longer affects: gnome-shell (Ubuntu)

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https://bugs.launchpad.net/bugs/1696929

Title:
  Touchpads are unresponsive and laggy

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