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nelsonwcf
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PostPosted: Mon Jun 13, 2016 12:41 pm    Post subject: KDE Synaptics Touchpad goes crazy: Reply with quote

After installing KDE synaptiks to make the touchpad better, I noticed that the mouse pointer sometimes jumps around. I've saw similar posts with this issue before but never a definitive solution for it. Do someone knows how can I fix it?

Best,
Nelson
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khayyam
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PostPosted: Mon Jun 13, 2016 1:33 pm    Post subject: Re: KDE Synaptics Touchpad goes crazy: Reply with quote

nelsonwcf wrote:
After installing KDE synaptiks to make the touchpad better, I noticed that the mouse pointer sometimes jumps around. I've saw similar posts with this issue before but never a definitive solution for it. Do someone knows how can I fix it?

nelsonwcf ... it is probably the result of MinSpeed/MaxSpeed or MaxTapTime/MaxTapMove ... please provide the outpout of 'synclient -l' and any trackpad/synaptics configuration in /etc/X11/xorg-conf.d.

I'm not familiar with KDE synaptiks but I expect it is using synclient and storing the parameters somewhere ... you'd have to ask a KDE user if you want a KDE synaptiks solution as I expect that any change I suggest would be overridden by KDE synaptiks ... can you not simply adjust the parameters provided testing the results?

best ... khay
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nelsonwcf
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PostPosted: Mon Jun 13, 2016 6:16 pm    Post subject: Reply with quote

Please see below

Parameter settings:
LeftEdge = 1666
RightEdge = 5360
TopEdge = 1498
BottomEdge = 4478
FingerLow = 25
FingerHigh = 30
MaxTapTime = 180
MaxTapMove = 242
MaxDoubleTapTime = 100
SingleTapTimeout = 180
ClickTime = 100
EmulateMidButtonTime = 0
EmulateTwoFingerMinZ = 282
EmulateTwoFingerMinW = 7
VertScrollDelta = 110
HorizScrollDelta = 110
VertEdgeScroll = 0
HorizEdgeScroll = 0
CornerCoasting = 0
VertTwoFingerScroll = 0
HorizTwoFingerScroll = 0
MinSpeed = 1
MaxSpeed = 1.75
AccelFactor = 0.0362
TouchpadOff = 0
LockedDrags = 0
LockedDragTimeout = 5000
RTCornerButton = 0
RBCornerButton = 0
LTCornerButton = 0
LBCornerButton = 0
TapButton1 = 0
TapButton2 = 0
TapButton3 = 0
ClickFinger1 = 1
ClickFinger2 = 3
ClickFinger3 = 2
CircularScrolling = 0
CircScrollDelta = 0.100007
CircScrollTrigger = 0
CircularPad = 0
PalmDetect = 0
PalmMinWidth = 10
PalmMinZ = 200
CoastingSpeed = 0
CoastingFriction = 50
PressureMotionMinZ = 30
PressureMotionMaxZ = 160
PressureMotionMinFactor = 1
PressureMotionMaxFactor = 1
GrabEventDevice = 0
TapAndDragGesture = 0
AreaLeftEdge = 0
AreaRightEdge = 0
AreaTopEdge = 0
AreaBottomEdge = 0
HorizHysteresis = 27
VertHysteresis = 27
ClickPad = 1
RightButtonAreaLeft = 3513
RightButtonAreaRight = 0
RightButtonAreaTop = 4096
RightButtonAreaBottom = 0
MiddleButtonAreaLeft = 0
MiddleButtonAreaRight = 0
MiddleButtonAreaTop = 0
MiddleButtonAreaBottom = 0

Thanks for the help.

Just to clarify what I call crazy: sometimes I'm just using the touchpad normally then the mouse pointer simply jumps for example to the top left right to the bottom left right instantly. That's what I call crazy.
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khayyam
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PostPosted: Mon Jun 13, 2016 6:47 pm    Post subject: Reply with quote

nelsonwcf ...

please try the following:

/etc/X11/xorg-conf.d/20-synaptics.conf:
Section "InputDevice"
   identifier "touchpad0"
   driver "synaptics"
   option "AutoServerLayout" "on"
   Option "LeftEdge" "1700"
   Option "RightEdge" "5300"
   Option "TopEdge" "1700"
   Option "BottomEdge"   "4200"
   Option "FingerLow" "25"
   Option "FingerHigh" "30"
   Option "MaxTapTime" "180"
   Option "MaxTapMove" "220"
   Option "MinSpeed" "0.7"
   Option "MaxSpeed" "0.8"
   Option "AccelFactor" "0.0010"
   Option "SHMConfig" "on"
   Option "TapButton1" "1"
   Option "VertTwoFingerScroll" "1"
   Option "HorizTwoFingerScroll" "1"
   Option "VertScrollDelta" "100"
EndSection

... restart x11 or the login manager (if one is in use), and try and reproduce the 'jump'.

nelsonwcf wrote:
Just to clarify what I call crazy: sometimes I'm just using the touchpad normally then the mouse pointer simply jumps for example to the top left right to the bottom left right instantly. That's what I call crazy.

As I said, the speed at which a gesture is registered can cause a very small gesture to be translated into a 'jump'. A number of factors play into this, geometry, speed, etc, so increasing the geometry, or lowering the speed, can result in the gesture behaving differently.

HTH & best ... khay
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nelsonwcf
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PostPosted: Thu Jun 16, 2016 7:03 pm    Post subject: Reply with quote

khayyam wrote:
nelsonwcf ...

please try the following:

/etc/X11/xorg-conf.d/20-synaptics.conf:
Section "InputDevice"
   identifier "touchpad0"
   driver "synaptics"
   option "AutoServerLayout" "on"
   Option "LeftEdge" "1700"
   Option "RightEdge" "5300"
   Option "TopEdge" "1700"
   Option "BottomEdge"   "4200"
   Option "FingerLow" "25"
   Option "FingerHigh" "30"
   Option "MaxTapTime" "180"
   Option "MaxTapMove" "220"
   Option "MinSpeed" "0.7"
   Option "MaxSpeed" "0.8"
   Option "AccelFactor" "0.0010"
   Option "SHMConfig" "on"
   Option "TapButton1" "1"
   Option "VertTwoFingerScroll" "1"
   Option "HorizTwoFingerScroll" "1"
   Option "VertScrollDelta" "100"
EndSection

... restart x11 or the login manager (if one is in use), and try and reproduce the 'jump'.

nelsonwcf wrote:
Just to clarify what I call crazy: sometimes I'm just using the touchpad normally then the mouse pointer simply jumps for example to the top left right to the bottom left right instantly. That's what I call crazy.

As I said, the speed at which a gesture is registered can cause a very small gesture to be translated into a 'jump'. A number of factors play into this, geometry, speed, etc, so increasing the geometry, or lowering the speed, can result in the gesture behaving differently.

HTH & best ... khay


You know, it seems to be working. How did you get these numbers? Is there some kind of software to "calibrate" the touchpad or something like it?

Thanks a lot!
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khayyam
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PostPosted: Thu Jun 16, 2016 7:27 pm    Post subject: Reply with quote

nelsonwcf wrote:
khayyam wrote:
nelsonwcf ...please try the following:

You know, it seems to be working. How did you get these numbers? Is there some kind of software to "calibrate" the touchpad or something like it? Thanks a lot!

nelsonwcf ... you're welcome. No, as I said, sometimes its just a matter of increasing the geometry, or decreasing speed. Now when you place your finger on the trackpad its a smaller fish in a larger pool and so the movement x1,y1 to x2,y2 is more fluid (or, less jumpy).

best ... khay
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