T480s Trackpoint drifts

[Kai Hendry]

On Thu, 22 Mar 2018, at 11:49 AM, Peter Hutterer wrote:
> see the libinput documentation, it's a normalised value from -1.0 (slowest) to
> 1.0 (fastest) with 0 being the usually-default midpoint.

     [hendry at t480s ~]$ xinput --set-prop 11 'libinput Accel Speed' -1

Has no impact to my drift problem. Not sure what else I can set.  "libinput Accel Speed Default" doesn't work.

[hendry at t480s ~]$ xinput --set-prop 11 'libinput Accel Default' -1
property 'libinput Accel Default' doesn't exist, you need to specify its type and format
[hendry at t480s ~]$ xinput --list-props 11
Device 'ETPS/2 Elantech TrackPoint':
        Device Enabled (140):   1
        Coordinate Transformation Matrix (142): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Natural Scrolling Enabled (275):       0
        libinput Natural Scrolling Enabled Default (276):       0
        libinput Left Handed Enabled (277):     0
        libinput Left Handed Enabled Default (278):     0
        libinput Accel Speed (279):     -1.000000
        libinput Accel Speed Default (280):     0.000000
        libinput Accel Profiles Available (281):        1, 1
        libinput Accel Profile Enabled (282):   1, 0
        libinput Accel Profile Enabled Default (283):   1, 0
        libinput Scroll Methods Available (284):        0, 0, 1
        libinput Scroll Method Enabled (285):   0, 0, 1
        libinput Scroll Method Enabled Default (286):   0, 0, 1
        libinput Button Scrolling Button (287): 2
        libinput Button Scrolling Button Default (288): 2
        libinput Middle Emulation Enabled (289):        0
        libinput Middle Emulation Enabled Default (290):        0
        libinput Send Events Modes Available (260):     1, 0
        libinput Send Events Mode Enabled (261):        0, 0
        libinput Send Events Mode Enabled Default (262):        0, 0
        Device Node (263):      "/dev/input/event7"
        Device Product ID (264):        2, 14
        libinput Drag Lock Buttons (291):       <no items>
        libinput Horizontal Scroll Enabled (292):       1
[hendry at t480s ~]$ xinput --set-prop 11 'libinput Accel Speed Default' -1
X Error of failed request:  BadAccess (attempt to access private resource denied)
  Major opcode of failed request:  131 (XInputExtension)
  Minor opcode of failed request:  57 ()
  Serial number of failed request:  20
  Current serial number in output stream:  21
[hendry at t480s ~]$ sudo xinput --set-prop 11 'libinput Accel Speed Default' -1
X Error of failed request:  BadAccess (attempt to access private resource denied)
  Major opcode of failed request:  131 (XInputExtension)
  Minor opcode of failed request:  57 ()
  Serial number of failed request:  20
  Current serial number in output stream:  21
[hendry at t480s ~]$