Geistest seems to capture correct gestures, containing up to two buttons
(more probably not supported by the hardware):

Gesture id 454 type 0 finished
        attr "device id" = 10
        attr "timestamp" = 21330897
        attr "root window id" = 173
        attr "event window id" = 46137382
        attr "child window id" = 46137382
        attr "focus x" = 0.000000
        attr "focus y" = 0.000000
        attr "gesture name" = "Drag,touch=2"
        attr "touches" = 2
        attr "delta x" = -0.186823
        attr "delta y" = 0.468864
        attr "velocity x" = -0.004671
        attr "velocity y" = 0.011722
        attr "position x" = 911.900818
        attr "position y" = 455.923828
        attr "boundingbox x1" = 765.478210
        attr "boundingbox y1" = 447.109161
        attr "boundingbox x2" = 1057.202637
        attr "boundingbox y2" = 465.676208
        attr "touch 0 id" = 2.000000
        attr "touch 0 x" = 1057.202637
        attr "touch 0 y" = 465.676208
        attr "touch 1 id" = 4.000000
        attr "touch 1 x" = 765.478210
        attr "touch 1 y" = 447.109161

Gesture id 490 type 1 finished
        attr "device id" = 10
        attr "timestamp" = 21477057
        attr "root window id" = 173
        attr "event window id" = 46137382
        attr "child window id" = 46137382
        attr "focus x" = 806.000000
        attr "focus y" = 328.000000
        attr "gesture name" = "Pinch,touch=2"
        attr "touches" = 2
        attr "radius delta" = -0.999410
        attr "radial velocity" = -0.024985
        attr "radius" = 108.662643
        attr "boundingbox x1" = 676.061279
        attr "boundingbox y1" = 328.580231
        attr "boundingbox x2" = 807.924805
        attr "boundingbox y2" = 458.100739
        attr "touch 0 id" = 2.000000
        attr "touch 0 x" = 807.924805
        attr "touch 0 y" = 328.580231
        attr "touch 1 id" = 3.000000
        attr "touch 1 x" = 676.061279
        attr "touch 1 y" = 458.100739

Why are those not giving any effect in the desktop or any programs?

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-input-evdev in Ubuntu.
https://bugs.launchpad.net/bugs/773138

Title:
  Two finger scrolling not working with touch screen using evdev driver

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