You are not logged in.

#1 2022-02-11 17:24:24

cephian
Member
Registered: 2018-10-07
Posts: 3

Touchpad occasionally has significant delay

Every once in a while (fairly often) my touchpad mouse gets very laggy. I want to be clear that it does NOT get "jumpy". The mouse still moves smoothly on the screen, but there's a 300-500ms or so delay between when my finger moves and when the mouse does.

Let me know if I should post any additional info. I'm starting to get suspicious that this may be a bug in the kernel itself.

Info/Things I've tried
- I have not been able to figure out if anything specific is correlated to it happening, it just seems to start and then go away at random times.
- This bug happens under both the libinput and Synaptics touchpad drivers.
- When I plug in an external mouse it has no lag, and the touchpad can be lagging at the exact same time the external mouse is not.
- I don't see anything suspicious in dmesg.
- Looking at the output of "libinput debug-events --device /dev/input/(my touchpad device)" I can visually see the delay between my finger movement and when the touchpad move events print (only when the mouse is lagging).
- The mouse polling rate (tested with evhz) averages 140hz and does not go down when it starts lagging.

System info
I'm running updated Arch Linux with standard kernel on an ASUS Zenbook 14 Laptop.
I'm using dwm under Xorg.

Touchpad section of output of "hwinfo"

  I: Bus=0018 Vendor=04f3 Product=3134 Version=0100
  N: Name="ASUE140A:00 04F3:3134 Touchpad"
  P: Phys=i2c-ASUE140A:00
  S: Sysfs=/devices/platform/AMDI0010:03/i2c-0/i2c-ASUE140A:00/0018:04F3:3134.0001/input/input15
  U: Uniq=
  H: Handlers=event12 mouse1
  B: PROP=5
  B: EV=1b
  B: KEY=e520 10000 0 0 0 0
  B: ABS=2e0800000000003
  B: MSC=20

Last edited by cephian (2022-02-11 17:33:43)

Offline

#2 2022-02-12 00:30:58

neo1973
Member
Registered: 2014-05-18
Posts: 3

Re: Touchpad occasionally has significant delay

This sounds very much like a known problem without a solution. I'm affected as well with a Lenovo Thinkbook 14 G3. See theses tickets for reference:

Offline

#3 2022-02-12 03:12:39

cephian
Member
Registered: 2018-10-07
Posts: 3

Re: Touchpad occasionally has significant delay

neo1973 wrote:

This sounds very much like a known problem without a solution. I'm affected as well with a Lenovo Thinkbook 14 G3. See theses tickets for reference:

It sounds similar, but it's definitely different than what I'm experiencing. The posts talk about mouse acceleration and inertia changing, for me all mouse settings functionally stay the same just with an added input lag. Also, my CPU is not Intel Tiger Lake, nor Intel at all. lscpu | grep 'Model name' gives me "AMD Ryzen 7 4700U with Radeon Graphics"

EDIT: Upon reading the comments more closely, I can see people reporting much more similar setups to me. It looks like this is the same type of thing I'm experiencing, thanks for the link.

Last edited by cephian (2022-02-12 05:35:56)

Offline

#4 2022-12-13 17:02:18

franka107
Member
Registered: 2022-12-13
Posts: 1

Re: Touchpad occasionally has significant delay

I have the same problem, my cpu is "AMD Ryzen 7 4700U with Radeon Graphics" and i am using Zorin OS

System info

OS: Zorin OS 16.2
Model: Acer Swift SF314-42-R9YN

Touchpad section of output of "hwinfo"

I: Bus=0018 Vendor=04f3 Product=312b Version=0100
  N: Name="ELAN0504:01 04F3:312B Touchpad"
  P: Phys=i2c-ELAN0504:01
  S: Sysfs=/devices/platform/AMDI0010:03/i2c-0/i2c-ELAN0504:01/0018:04F3:312B.0001/input/input15
  U: Uniq=
  H: Handlers=mouse1 event11
  B: PROP=5
  B: EV=1b
  B: KEY=e520 10000 0 0 0 0
  B: ABS=2e0800000000003
  B: MSC=20

Last edited by franka107 (2022-12-13 17:13:05)

Offline

#5 2023-01-19 08:05:54

burakuren101
Member
Registered: 2023-01-19
Posts: 1

Re: Touchpad occasionally has significant delay

I have same problem too, cpu is AMD Ryzen 7 5700u with Radeon Graphics and I use Arch Linux with Gnome.

Laptop: Thinkpad E14 G3

Touchpad info:
  I: Bus=0011 Vendor=0002 Product=000e Version=0000
  N: Name="ETPS/2 Elantech Touchpad"
  P: Phys=isa0060/serio1/input0
  S: Sysfs=/devices/platform/i8042/serio1/input/input7
  U: Uniq=
  H: Handlers=event8 mouse1
  B: PROP=5
  B: EV=b
  B: KEY=e420 10000 0 0 0 0
  B: ABS=661800011000003

Offline

Board footer

Powered by FluxBB