ubuntu-x-swat team mailing list archive

[cuke <filippocucchetto@xxxxxxxxx>]

Public bug reported:

After some time (randomly) the touchpad stop working correctly. 
i'm on a acer aspire 5943g. This is the a grep of my Xorg.log:
[    32.674] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event9)
[    32.675] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[    32.679] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[    32.679] (**) SynPS/2 Synaptics TouchPad: always reports core events
[    33.016] (--) synaptics: SynPS/2 Synaptics TouchPad: x-axis range 1472 - 5744
[    33.016] (--) synaptics: SynPS/2 Synaptics TouchPad: y-axis range 1408 - 4792
[    33.016] (--) synaptics: SynPS/2 Synaptics TouchPad: pressure range 0 - 255
[    33.016] (--) synaptics: SynPS/2 Synaptics TouchPad: finger width range 0 - 0
[    33.016] (--) synaptics: SynPS/2 Synaptics TouchPad: buttons: left right double triple scroll-buttons
[    33.016] (--) synaptics: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
[    33.136] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[    33.136] (**) SynPS/2 Synaptics TouchPad: always reports core events
[    33.256] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 12)
[    33.256] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MinSpeed is now constant deceleration 2.5
[    33.257] (**) synaptics: SynPS/2 Synaptics TouchPad: MaxSpeed is now 1.75
[    33.257] (**) synaptics: SynPS/2 Synaptics TouchPad: AccelFactor is now 0.037
[    33.257] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
[    33.257] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 1
[    33.257] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[    33.257] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[    33.257] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[    33.258] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)

I debugged a little with synclient. Normally (as stated above) the touchpad area is from 1472 to 5744 for the x-axis and 1408 to 4792 on the y-axis.
When this happen:
1) touching the right side i get x: 5800 (correct), istead on the left side 5600(incorrect). So it's like the x coordinate isn't read correctly on the left side of the touchpad.
2) Related to the first issue, doing the same thing in an area close to the bottom-right corner i get a value of x that range from 5000 to 5700. Thus the touchpad somehow works on the bottom right area.
3) However if i touch on the right area and move to the left area without removing the finger the x coordinate correctly range from 5800 to 1100!! 
4) the other issue it's the wrong number of fingers. Again touching on the bottom-right corner i get one finger (correct), instead on the left side 2

I didn't find the reason that generated this bug, so i can't reproduce
it. Looking at the xorg logs or dmesg i didn't notice any error message.

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/876782

Title:
  Touchpad loose X axis and mostly detect 2 fingers

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