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Synaptics Touchpad lag
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Massimo B.
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PostPosted: Mon Apr 29, 2024 6:55 am    Post subject: Synaptics Touchpad lag Reply with quote

The touchpad on Linux, using Xorg and Xfce, feels like having a short lag of about 100ms or more, compared to Windows.
Code:
$ xinput |grep ELAN
⎜   ↳ ELAN074B:00 04F3:3169 Mouse                id=10   [slave  pointer  (2)]
⎜   ↳ ELAN074B:00 04F3:3169 Touchpad             id=11   [slave  pointer  (2)]
When starting to move the pointer, the reaction is always about 100ms behind which makes it a bit uncomfortable to use compared to a wired mouse.
Is there anything I can do to avoid or measure the lag?

Part of hwinfo:
Code:
  I: Bus=0018 Vendor=04f3 Product=3169 Version=0100
  N: Name="ELAN074B:00 04F3:3169 Mouse"
  P: Phys=i2c-ELAN074B:00
  S: Sysfs=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-ELAN074B:00/0018:04F3:3169.0001/input/input10
  U: Uniq=
  H: Handlers=mouse1 event6
  B: PROP=0
  B: EV=17
  B: KEY=30000 0 0 0 0
  B: REL=3
  B: MSC=10
 
  I: Bus=0018 Vendor=04f3 Product=3169 Version=0100
  N: Name="ELAN074B:00 04F3:3169 Touchpad"
  P: Phys=i2c-ELAN074B:00
  S: Sysfs=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-ELAN074B:00/0018:04F3:3169.0001/input/input12
  U: Uniq=
  H: Handlers=mouse2 event7
  B: PROP=5
  B: EV=1b
  B: KEY=e520 10000 0 0 0 0
  B: ABS=2e0800000000003
  B: MSC=20

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Massimo B.
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PostPosted: Fri Jul 12, 2024 12:32 pm    Post subject: Reply with quote

Meanwhile I enabled the threadirqs option for better audio processing and it feels like being a bit better now.
Though on a direct comparison with Windows, the pointer movement isn't feeling that straight like on Windows.
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