[Wayland-bugs] [Bug 106141] Thinkpad X240 touchpad movement is jumpy and extremely imprecise

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106141

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #10 from Peter Hutterer <peter.hutterer at who-t.net> ---
deltas on a per-event basis:

 0.544368: ↙←   -2/   1 |  *********** | 
 0.554709: ↙↓   -2/  18 |  *********** | 
 0.564084: ↙↓   -2/  18 |  *********** | 
 0.574229: ↙←  -21/  18 |  *********** | 
 0.584444: ↙↓   -2/  18 |  *********** | 
 0.595000: ↙↓   -4/  18 |  *********** | 
 0.604237: ↙←  -22/  18 |  *********** | 
 0.624738: ↙↓   -4/  18 |  *********** | 
 0.635189: ↙↓   -4/  18 |  *********** | 
 0.644283: ↙←  -22/  18 |  *********** | 
 0.654523: ↙↓   -1/  18 |  *********** | 
 0.664768: ↙↓   -2/  18 |  *********** | 
 0.675160: ↙←  -24/  18 |  *********** | 
 0.685256: ↙↓   -2/  18 |  *********** | 
 0.695281: ↙←  -24/  18 |  *********** | 
 0.709745: ↙↓   -2/  18 |  *********** | 
 0.725301: ↙←  -28/  18 |  *********** | 
 0.735631: ↙↓   -2/  18 |  *********** | 
 0.744848: ↙↓   -2/  18 |  *********** | 
 0.755461: ↙←  -25/  18 |  *********** | 
 0.765650: ↙↓   -4/  18 |  *********** | 
 0.776020: ↙←  -27/  18 |  *********** | 

 1.166998: ↖↑   -1/  -2 |  *********** | 
 1.177127: ↖↑   -1/  -2 |  *********** | 
 1.187562: ↖↑   -2/ -19 |  *********** | 
 1.197899: ↖↑   -2/ -19 |  *********** | 
 1.208095: ↖←  -20/ -19 |  *********** | 
 1.218402: ↖←  -20/  -2 |  *********** | 
 1.227577: ↖←   -2/  -2 |  *********** | 
 1.237896: ↖↑   -1/  -2 |  *********** | 
 1.248211: ↖←   -2/  -2 |  *********** | 


 1.951817: ↑↗    1/  -1 |  *********** | 
 1.962119: ↑↗    1/  -1 |  *********** | 
 1.972333: ↑↗    1/  -1 |  *********** | 
 1.982479: ↑↗    1/  -1 |  *********** | 
 1.991914: →↗   19/  -1 |  *********** | 
 2.012382: →↗   19/  -2 |  *********** | 
 2.022765: →↗   19/  -1 |  *********** | 
 2.033004: ↑↗    1/  -1 |  *********** | 
 2.042179: ↑↗    1/ -17 |  *********** | 


So yeah, this is very much garbage coming out of the device. No idea why this
is supposed to work fine with synaptics though, I don't think it does any
smoothing over what we do already in libinput.

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