noticeable touchpad lag that feels like a low-pass for movements

Bug #1305494 reported by PeterPall on 2014-04-10
26
This bug affects 4 people
Affects Status Importance Assigned to Milestone
xserver-xorg-input-synaptics (Ubuntu)
Low
Unassigned

Bug Description

The touchpad on my new laptop works fine (with multitouch and all) but when I stop moving my finger the mouse pointer still moves for a quarter of a second or similar as if a low-pass would filter the movements. Unfortunately this delay makes it hard not to miss a button at the first try and having to come back because stopping exactly a quarter of a second before the pointer hits the button - involves complex timing; When clicking or tapping on the buttons I don't get any noticable delay.

I know that when using the OS from M$ you can activate a low-pass filter for movements that is called "trägheitsbewegung" in the german version of that OS.

Is there a way to do the same on Ubuntu?

[148735.141] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/event12)
[148735.141] (**) ETPS/2 Elantech Touchpad: Applying InputClass "evdev touchpad catchall"
[148735.141] (**) ETPS/2 Elantech Touchpad: Applying InputClass "Multitouch Touchpad"
[148735.141] (II) LoadModule: "mtrack"
[148735.141] (II) Loading /usr/lib/xorg/modules/input/mtrack_drv.so
[148735.141] (II) Module mtrack: vendor="X.Org Foundation"
[148735.141] compiled for 1.15.0, module version = 0.1.0
[148735.141] Module class: X.Org XInput Driver
[148735.142] ABI class: X.Org XInput driver, version 20.0
[148735.142] (II) Using input driver 'mtrack' for 'ETPS/2 Elantech Touchpad'
[148735.142] (**) ETPS/2 Elantech Touchpad: always reports core events
[148735.142] (**) ETPS/2 Elantech Touchpad: always reports core events
[148735.142] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input7/event12"
[148735.142] (II) XINPUT: Adding extended input device "ETPS/2 Elantech Touchpad" (type: TOUCHPAD, id 13)
[148735.142] (II) device control: init
[148735.142] (**) Option "Device" "/dev/input/event12"
[148735.142] (II) mtrack: devname: ETPS/2 Elantech Touchpad
[148735.142] (II) mtrack: devid: 2 e 0
[148735.142] (II) mtrack: caps: left mtdata
[148735.142] (II) mtrack: 0: min: 0 max: 2220
[148735.142] (II) mtrack: 5: min: 0 max: 3256
[148735.142] (II) mtrack: 6: min: 0 max: 1776
[148735.142] (II) mtrack: 9: min: 0 max: 65535
[148735.142] (II) mtrack: 10: min: 0 max: 255
[148735.156] (**) ETPS/2 Elantech Touchpad: (accel) keeping acceleration scheme 1
[148735.156] (**) ETPS/2 Elantech Touchpad: (accel) acceleration profile 0
[148735.156] (**) ETPS/2 Elantech Touchpad: (accel) acceleration factor: 2.000
[148735.156] (**) ETPS/2 Elantech Touchpad: (accel) acceleration threshold: 4
[148735.156] (II) device control: on
[148735.156] (II) Touchpad supports regular touches.
[148735.156] (II) touch_min = 0, touch_max = 2220
[148735.156] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/mouse1)
[148735.157] (**) ETPS/2 Elantech Touchpad: Applying InputClass "Multitouch Touchpad"
[148735.157] (II) Using input driver 'mtrack' for 'ETPS/2 Elantech Touchpad'
[148735.157] (**) ETPS/2 Elantech Touchpad: always reports core events
[148735.157] (**) ETPS/2 Elantech Touchpad: always reports core events
[148735.157] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input7/mouse1"
[148735.157] (II) XINPUT: Adding extended input device "ETPS/2 Elantech Touchpad" (type: TOUCHPAD, id 14)
[148735.157] (II) device control: init
[148735.157] (**) Option "Device" "/dev/input/mouse1"
[148735.157] (EE) mtrack: cannot configure device
[148735.157] (EE) Couldn't init device "ETPS/2 Elantech Touchpad"
[148735.157] (II) UnloadModule: "mtrack"

Did get this problem on a Trusty box.

Launchpad Janitor (janitor) wrote :

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

Changed in xserver-xorg-input-synaptics (Ubuntu):
status: New → Confirmed
Gabe (gabe565) wrote :

I actually am having this issue too. It is just enough input lag to be annoying. I also have an "ETPS/2 Elantech Touchpad"

PeterPall, thank you for reporting this and helping make Ubuntu better.

To see if this is already resolved, could you please test http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?

Changed in xserver-xorg-input-synaptics (Ubuntu):
importance: Undecided → Low
status: Confirmed → Incomplete
Launchpad Janitor (janitor) wrote :

[Expired for xserver-xorg-input-synaptics (Ubuntu) because there has been no activity for 60 days.]

Changed in xserver-xorg-input-synaptics (Ubuntu):
status: Incomplete → Expired
Alonso Gutierrez (alonsougc) wrote :

Has there been any update on this? It has been 3 years later and I am still having this issue.

Alonso Gutierrez (alonsougc), it will help immensely if you filed a new report with Ubuntu by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information running the following from a terminal:
ubuntu-bug xorg

Also, please feel free to subscribe me to it.

For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs.

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Hi Christopher,

I actually sorta solved this by going to xinput and setting the property
"device acceleration profile" to 0.

On Mon, Jan 9, 2017, 3:25 PM Christopher M. Penalver <
<email address hidden>> wrote:

> Alonso Gutierrez (alonsougc), it will help immensely if you filed a new
> report with Ubuntu by ensuring you have the package xdiagnose installed,
> and that you click the Yes button for attaching additional debugging
> information running the following from a terminal:
> ubuntu-bug xorg
>
> Also, please feel free to subscribe me to it.
>
> For more on why this is helpful, please see
> https://wiki.ubuntu.com/ReportingBugs.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1305494
>
> Title:
> noticeable touchpad lag that feels like a low-pass for movements
>
> Status in xserver-xorg-input-synaptics package in Ubuntu:
> Expired
>
> Bug description:
> The touchpad on my new laptop works fine (with multitouch and all) but
> when I stop moving my finger the mouse pointer still moves for a quarter of
> a second or similar as if a low-pass would filter the movements.
> Unfortunately this delay makes it hard not to miss a button at the first
> try and having to come back because stopping exactly a quarter of a second
> before the pointer hits the button - involves complex timing; When clicking
> or tapping on the buttons I don't get any noticable delay.
>
> I know that when using the OS from M$ you can activate a low-pass filter
> for movements that is called "trägheitsbewegung" in the german version of
> that OS.
>
> Is there a way to do the same on Ubuntu?
>
> [148735.141] (II) config/udev: Adding input device ETPS/2 Elantech
> Touchpad (/dev/input/event12)
> [148735.141] (**) ETPS/2 Elantech Touchpad: Applying InputClass "evdev
> touchpad catchall"
> [148735.141] (**) ETPS/2 Elantech Touchpad: Applying InputClass
> "Multitouch Touchpad"
> [148735.141] (II) LoadModule: "mtrack"
> [148735.141] (II) Loading /usr/lib/xorg/modules/input/mtrack_drv.so
> [148735.141] (II) Module mtrack: vendor="X.Org Foundation"
> [148735.141] compiled for 1.15.0, module version = 0.1.0
> [148735.141] Module class: X.Org XInput Driver
> [148735.142] ABI class: X.Org XInput driver, version 20.0
> [148735.142] (II) Using input driver 'mtrack' for 'ETPS/2 Elantech
> Touchpad'
> [148735.142] (**) ETPS/2 Elantech Touchpad: always reports core events
> [148735.142] (**) ETPS/2 Elantech Touchpad: always reports core events
> [148735.142] (**) Option "config_info"
> "udev:/sys/devices/platform/i8042/serio1/input/input7/event12"
> [148735.142] (II) XINPUT: Adding extended input device "ETPS/2 Elantech
> Touchpad" (type: TOUCHPAD, id 13)
> [148735.142] (II) device control: init
> [148735.142] (**) Option "Device" "/dev/input/event12"
> [148735.142] (II) mtrack: devname: ETPS/2 Elantech Touchpad
> [148735.142] (II) mtrack: devid: 2 e 0
> [148735.142] (II) mtrack: caps: left mtdata
> [148735.142] (II) mtrack: 0: min: 0 max: 2220
> [148735.142] (II) mtrack: 5: min: 0 max: 3256
> [148735.142] (II) mtrack: 6: min: 0 max: 1776
> [...

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