XPS13 L322X Bionic (daily dev) touchpad laggy

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Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.15 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15

I have not this issue since original kernel 3.xx series in Trusty up to the current 4.4.0-111.
The issue appeared in the live session (not installed)

So I don't know howto test the upstream kernel with Bionic in this machine without overwriting my currently installed Trusty. Or is there an available Bionic iso with upstream or a tuto on howto replace the kernel in the iso ?

Just install the kernel package. You can remove it anytime. It won't affect your installed system.

Ah, ok, I thought it was a bug with XPS13-AND-BIONIC-AND-K4.13.
I installed in my XPS13 Trusty and I have no issue with the touchpad. Maybe I didn't wait enough to make sure F6-OSD is bug-free. Maybe these 2 problems are only related to live-USB ?

Do you have the issue on Trusty with Linux kernel v4.15?

Just tried : neither this issue with Trusty K4.4.0-112 nor K4.15.1 real installs.
Only met it with Bionic-dev-Live-K4

Just tried : neither this issue with Trusty K4.4.0-112 nor K4.15.1 real installs.
Only met it with Bionic-dev-Live-K4. I also tried the Live USB with acpi_osi=Linux as seen (but not mandatory) in my usual /etc/default/grub, with no difference : touchpad cursor still laggy, often locks for a while. I noticed that when the touchpad is glued in position on the screen, it is still responsive on right and bottom sides, although the option ~scroll on sides~ is disabled by default in Devices settings. Changing the option as no effect, neither as disabling default enabled 2-Fingers-Scroll.
An other strange issue I met with the Live USB : when I reboot from Live, I can't go back in Live with my BIOS F12 Select boot drive: even when I select USB Live, then the usual grub menu is displayed. I have to completely shutdown
the laptop so that USB boot selection works, when this is not the case when I reboot from usual installed Trusty.
I ran these tests with a new Bionic USB stick created from a Live Bionic session, itself running from the first Bionic key (that was created from an real Xenial install on another machine).

So it's more likely to be a userspace issue.

The Eleventh Commandment ?

Bib,

Comment #11 is probably missing because people can hide their own comments if they make a mistake etc.

A laggy touchpad is probably because you have an old version of libinput installed. The lag is mostly fixed in the latest libinput version so please tell us what version of package 'libinput10' you have installed.

If you have an old version then this bug would be a duplicate of bug 1696929.

If you have the current version the this bug may be similar to the touchpad range bug 1586683.

Daniel, comment #11 was probably a double post.
libinput10 is the one in the live

Please tell us the exact version that is problematic:

dpkg -s libinput10 | grep Version

I read the touchpad range bug 1586683. This is not the same as my laptop is Dell XPS13 developper edition (L322X), and at ~best~ I could say the behaviour is reversed : my TP would have normal sensitivity on right+bottom, and poor on center. Although this doesn't look like a sensitivity issue, merely some usb buffer overflow or irq or I don't know what, as I can move the cursor touching the central part on the touchpad, the cursor moves OK then still sliding my finger as usual the cursor stops moving. I have then to wait for a while to recover the ability to make another move

dpkg -s libinput10 | grep Version
1.9.4-2ubuntu1

Thanks for the information.

So that we can confirm if this is a bug in libinput or the kernel, please try this:

1. sudo apt install xserver-xorg-input-synaptics
2. Log out
3. Log in to "Ubuntu on Xorg".
4. Verify the driver has changed by running "synclient" and you should see lots of information.

Does that fix the issue?

No, it doesn't : E: unable to find package xserver-xorg-input-synaptics
even after I ran a pass of the updates-manager: e.g there was a kernel update from 4.13.25 to 4.13.32 but once installed an rebooted, no way to select it, and sudo update-grub fails with ~can't find /cow~
Remember this is a live-USB. Also, the startup-disk-creator doesn't allow anymore to create a persistent r/w partition to store files.

OK then. We can either wait for you to install Ubuntu-proper, or you can progress the issue with libinput developers immediately by going here:

  https://bugs.freedesktop.org/enter_bug.cgi?product=wayland&component=libinput

Please let us know when you have either tested xserver-xorg-input-synaptics, or have logged an upstream bug using the above link.

https://bugs.freedesktop.org/show_bug.cgi?id=104990
I can't proper install before this is fixed because it will break my system. I'd need to buy another M2 SSD to perform this.

Edit : it seems there are yet other bugs filled about soething around this.

Awaiting information upstream: https://bugs.freedesktop.org/show_bug.cgi?id=104990

I have upgraded to Bionic recently and my touchpad immediately became close to unusable. The sensitivity was WAY too high so the cursor could only be moved with extremely low pressure. Anything beyond seemed to be considered a palm pressure or something. In addition, the touchpad buttons had become unusable wrt. click/hold+swipe to drag stuff around. The problems occurred both in Wayland and XOrg.

I did a clean Bionic reinstall which did not help. Then I reinstalled Artful and the problems where resolved. After a subsequent upgrade to Bionic the problem reappeared.

Sorry for being trigger happy...

I am using a Dell XPS13.

Silvio, unless you're using the L322X model, please log a new bug.

Yes, it is an XPS13 L322X model.

Silvio,

Still, it sounds like you're reporting a different problem. This bug is about the touchpad being laggy (on an older version of libinput).

Please log a new bug for your issue by running this command on the machine:

  ubuntu-bug libinput

Well. I had reverted to Artful so that was easier said than done. I upgraded to Bionic once more. That brought back the problem but "ubuntu-bug libinput" then complained that I did not have that package installed. I did not know what libinputxxx package to use and I got tired of soft-stroking my touchpad and reinstalled Artful once more. I may have more time to spend on this the coming weeks and then I will try again.

Sorry, maybe try:

  ubuntu-bug libinput10

Silvio, I gave a try with latest daily Bionic which comes with libinput10 1.10.3 and the result is exactly the way you describe. My "laggy" word is not accurate.

Thank you for this information Bib, saves me a lot of time. And this confirms we are talking about the same bug.

I am using Wayland exclusively and have libinput10 1.8.4-0ubuntu0.17.10.1 installed. Touchpad is working fine. So this is something that was introduced with the version that comes with Bionic (or an intermediate one).

Hello,

Same problem here with my XPS13 L322X: I installed the daily dev version yesterday.
The installation of xserver-xorg-input-synaptics reduces the problem (the mouse is a little more fluid, but does not correct it).

Upstream is awaiting feedback to diagnose this problem. Please comment there:

https://bugs.freedesktop.org/show_bug.cgi?id=104990

How do I do this ? I booted a live stick but libinput-tools isn't there and there is no way to run tests the good old way when disk-creator allowed to have a user partition or install software in the live session. How can I run these tests please without breaking my Trusty ?

I've also got an L322X - and am experiencing this same issue, touchpad seems to lock up after some time, and is also impossible to click and drag with.

I've just installed a fresh Bionic system onto my machine, and have the latest updates. That did not seem to help.

I installed "xserver-xorg-input-synaptics" and now the touchpad seems to work fine when I use the Xorg session. I haven't tried the Wayland session.

I posted my own touchpad sensitivity measures at freedesktop link above.

@all you guy using a L322X who tried live USB, did you also hit the issue where OSD notice popup for keyboard backlight that triggers on it's own sometimes ?

Yeah I also see the OSD keyboard backlight issue - but I actually have been seeing that from time to time even in Artful and possibly before. I assumed it was my hardware playing up, but seems like maybe not. At any rate, it's not very frequent for me - only a couple of times after boot.

Hi seanlano. Did you report a bug here for this (I ask to know if I can "me too") ?

Hey Bib, I have not filed a bug for the backlight OSD yet - I was too lazy ;) I'll "me too" one if you open it though.

I've followed the step linked to in https://bugs.freedesktop.org/show_bug.cgi?id=104990 and have found that using 'libinput measure touchpad-pressure --touch-thresholds=105:60 --palm-threshold=230' seemed to work well.

I was not able to format it into the hwdb file, however, so couldn't actually test it on my machine.

OK, I've worked with the Freedesktop libinput upstream team and have a patch to fix this issue: https://bugs.freedesktop.org/show_bug.cgi?id=104990

Thank you Sean. I tried and needed to change a bit your tweak so that it
matches :
https://bugs.freedesktop.org/show_bug.cgi?id=104990#c23
Been a pure newb and the trial was so hard for me, I don't feel I'm
courageous enough to push anything in the git.
Can I hope you'll do it or do I have to work this myself for the community?

Best thanks and regards
Fabrice

Le 13/04/2018 à 10:35, seanlano a écrit :
> OK, I've worked with the Freedesktop libinput upstream team and have a
> patch to fix this issue:
> https://bugs.freedesktop.org/show_bug.cgi?id=104990
>

I've updated my patch to libinput, in https://bugs.freedesktop.org/show_bug.cgi?id=104990#c25

Hopefully the devs there will shortly be able to revert the older patch, apply the new one, and then it will make it's way into Bionic.

I'm not skilled at all with hwdb & libinput syntax : didn't you forget
the "pn" substring before *XPSL322X* ?

Le 15/04/2018 à 05:02, seanlano a écrit :
> I've updated my patch to libinput, in
> https://bugs.freedesktop.org/show_bug.cgi?id=104990#c25
>
> Hopefully the devs there will shortly be able to revert the older patch,
> apply the new one, and then it will make it's way into Bionic.
>

On my machine, the complete string is dmi:bvnDellInc.:bvrA08:bd04/18/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0WW7PG:rvrA00:cvnDellInc.:ct8:cvr0.1 - so the *XPSL322X* seems to still match. I'm not sure on the syntax either really, but it seemed to work for me at least - did it work for you?

It does.
You see, I believe bvr in the string surely stands for BIOS Vendor
Release. You are @A08, and I @A10. This may be the reason for a
different "pn" returned string for the exactly same computer.
Silly Vendor
Thank you Sean

Le 15/04/2018 à 12:24, seanlano a écrit :
> On my machine, the complete string is
> dmi:bvnDellInc.:bvrA08:bd04/18/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0WW7PG:rvrA00:cvnDellInc.:ct8:cvr0.1
> - so the *XPSL322X* seems to still match. I'm not sure on the syntax
> either really, but it seemed to work for me at least - did it work for
> you?
>

I just tried the daily Live CD image for Bionic, but the patch to libinput doesn't seem to have made it in yet. What needs to happen for the fix to make it into Bionic?

It appears the fix is in libinput version 1.10.5, but bionic is shipping version 1.10.4.

https://lists.freedesktop.org/archives/wayland-devel/2018-April/037934.html
https://launchpad.net/ubuntu/+source/libinput

As today is release day for bionic, we can talk about patching the fix in after release. So to answer your question; what needs to happen is:

https://wiki.ubuntu.com/StableReleaseUpdates

It's a pity remembering this laptop was sold by Dell with Ubuntu 12.04, regards to Sputnik project. Something, anything else was forgotten?

That would have been between 2012 and 2014, during which time Ubuntu did not use libinput at all. We only started using libinput in Ubuntu in 2017.

You can go back to the old touchpad driver (it was sold with) if you're willing to use Xorg sessions only. Just install:

  sudo apt install xserver-xorg-input-synaptics

Oh, ok. I wasn't skilled enough to run all the tests freedesktop asked. I don't know if a single sample as given there by Sean IIRC is enough accurate for such a HID that may have its sensitivity range spread around some typical value supplied by the manufacturer. Then maybe it would be worth converting the values from xserver-xorg-input-synaptics to libinput as at least in my l322x, the touchpad was really easy to use.
Whatever, Thanks Ubuntu teams

Damn, just missed out. :/ Thanks Daniel. :)

Looks like there's only very minor changes in 1.10.5, so judging by the criteria for SRU it shouldn't be too hard. I'll get onto a bug report for that at some point, it at least can (hopefully) make it into the 18.04.2 release Live CD. Will be a bit of a pain in the meantime.

Opened a bug here: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1767559

Haven't done an SRU request before, so we'll see how it goes.

There doesn't seem to be anything committed yet:
https://launchpad.net/ubuntu/+source/libinput

Not 100% certain if this is the right bug for this, but I'm seeing similar behaviour for trackpoints and touchpads on the Thinkpad X230 and Thinkpad X131e for at least Ubuntu (standard) and Ubuntu MATE.

Laggy is a vague term, but for me specifically I'm seeing that the cursor moves in a constant motion until I stop. Then after a small moment, it "jumps" a short/random distance in the direction of motion before I stopped. This is very very pronounced when using the trackpoint.

I see some similar reports on various corners on the internet that is similar to what I'm seeing:

- https://www.reddit.com/r/Ubuntu/comments/8fiiik/touchpad_not_working_properly_on_ubuntu_1804/
  - OP reports "The cursor moves slowly but suddenly very fast."

- https://askubuntu.com/questions/1030847/ubuntu-18-04-lts-intel-graphics-issue
- https://askubuntu.com/questions/1031447/why-is-my-ubuntu-18-04-lagging-and-there-is-also-difficulty-using-mouse-it-is

Just downloaded libinput 1.8.4 from artful-updates, compiled the debian package via debuild and installed it on my bionic system. Rebooted the system and I'm _fairly certain_ the laggy cursor problem gone away.

At this point I might be able to bisect the problem with different versions of libinput, as well as try the new release.

Tried all the way down to 1.9.2 (from https://salsa.debian.org/xorg-team/lib/libinput/tags), as well as 1.10.5. The issue for me on the trackpoint seem to be present on every version there.

I also think I notice a pattern, it seems that the "jump" occurs after I stop going from some coordinate A to B, right as I apply pressure on the trackpoint to move my cursor backwards. However, the jump occurs from B away from A, which is not expected and make it seem laggy/unintuitive.

Additionally, I noticed that the trackpoints with 1.9.2+ libinput are significant faster than 1.8.4.

I have a slow mo video of this that I can upload in the morning.

Shuhao: You are commenting on the wrong bug.

This bug is about Ubuntu 18.04 running on Dell L322X only.

Also, the L322X has no trackpoint.

This bug was fixed in the package libinput - 1.11.1-1

---------------
libinput (1.11.1-1) unstable; urgency=medium

  * New upstream release. (LP: #1764097, #1746740, #1761365)
  * tests: Add a simple smoketest to check that linking to libinput
    works. Thanks, Simon McVittie! (Closes: #893391)
  * watch: Update upstream git repo location.
  * symbols: Updated.

 -- Timo Aaltonen <email address hidden> Thu, 21 Jun 2018 22:14:02 +0300

Same problem here. Upgraded libinput10 and libinput-bin to 1.11.1-1. Problem still persists.

This bug is closed.

If you would like to discuss any ongoing problems then please create a new bug by running:

  ubuntu-bug libinput10

Correction:

This bug is closed for users of libinput 1.11. It is still open and unresolved for users of libinput 1.10 (Ubuntu 18.04).

Only if you are already using libinput 1.11 and you still have problems should you open a new bug.

Would it be possible for this fix to be added to the L321x (the previous version to l322x)
They share the same hardware, Dell just updated the processors once they released the 322x. I upgraded from 17.10 to 18.04 (lts) and I am unable to click and drag, and I need to use the touchpad slowly..

It appears the bug fix is unique to the laptop model number "L322X" so won't work on L321X.

Please open a new bug for that by running:

  ubuntu-bug libinput

Bug 1816947 is now tracking the L321X.