[Bug 1896540] Re: Incorrectly specified Touchpad size for Lenovo T490

[William Wilson]

@arutyun-akopov, can you try the workaround detailed in comment #1?

** Changed in: systemd (Ubuntu)
       Status: Expired => Incomplete

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Title:
  Incorrectly specified Touchpad size for Lenovo T490

Status in libinput package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  The vertical sensitivity of the touchpad on my laptop Lenovo T490
  seemed significantly higher than the horizontal sensitivity. After
  doing some research I found out that the touchpad size is incorrectly
  listed by the kernel.

  Touchpad size listed by the kernel: 77x107mm
  The real size of the touchpad: 68x100mm

  Description:	Ubuntu 20.04.1 LTS
  Release:	20.04
  Systemd version: 245.4-4ubuntu3.2

  Output from the touchpad-edge-detector:

  miroslav at miroslav-ThinkPad-T490:~$ sudo touchpad-edge-detector 68x100 /dev/input/event5
  Touchpad SynPS/2 Synaptics TouchPad on /dev/input/event5
  Move one finger around the touchpad to detect the actual edges
  Kernel says:	x [1266..5678], y [1162..4694]
  Touchpad sends:	x [1266..5678], y [1161..4694] -^C

  Touchpad size as listed by the kernel: 77x107mm
  User-specified touchpad size: 68x100mm
  Calculated ranges: 4412/3533

  Suggested udev rule:
  # <Laptop model description goes here>
  evdev:name:SynPS/2 Synaptics TouchPad:dmi:bvnLENOVO:bvrN2IET75W(1.53):bd08/21/2019:svnLENOVO:pn20N2CTO1WW:pvrThinkPadT490:rvnLENOVO:rn20N2CTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:*
   EVDEV_ABS_00=1266:5678:65
   EVDEV_ABS_01=1161:4694:35
   EVDEV_ABS_35=1266:5678:65
   EVDEV_ABS_36=1161:4694:35

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