How can I set up two-finger scrolling on an ALPS touchpad that doesn't support multiple fingers?
The relevant output from xinput list
is as follows:
⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ PS/2 Mouse id=12 [slave pointer (2)] ⎜ ↳ AlpsPS/2 ALPS GlidePoint id=13 [slave pointer (2)]
and the output of synclient -l
is:
Parameter settings: LeftEdge = 153 RightEdge = 870 TopEdge = 115 BottomEdge = 652 FingerLow = 12 FingerHigh = 14 FingerPress = 127 MaxTapTime = 180 MaxTapMove = 56 MaxDoubleTapTime = 180 SingleTapTimeout = 180 ClickTime = 100 FastTaps = 0 EmulateMidButtonTime = 75 EmulateTwoFingerMinZ = 139 EmulateTwoFingerMinW = 7 VertScrollDelta = 25 HorizScrollDelta = 25 VertEdgeScroll = 1 HorizEdgeScroll = 0 CornerCoasting = 0 VertTwoFingerScroll = 0 HorizTwoFingerScroll = 0 MinSpeed = 1 MaxSpeed = 1.75 AccelFactor = 0.156495 TrackstickSpeed = 40 EdgeMotionMinZ = 14 EdgeMotionMaxZ = 79 EdgeMotionMinSpeed = 1 EdgeMotionMaxSpeed = 102 EdgeMotionUseAlways = 0 TouchpadOff = 1 LockedDrags = 0 LockedDragTimeout = 5000 RTCornerButton = 2 RBCornerButton = 3 LTCornerButton = 0 LBCornerButton = 0 TapButton1 = 1 TapButton2 = 3 TapButton3 = 2 ClickFinger1 = 1 ClickFinger2 = 1 ClickFinger3 = 1 CircularScrolling = 0 CircScrollDelta = 0.1 CircScrollTrigger = 0 CircularPad = 0 PalmDetect = 0 PalmMinWidth = 10 PalmMinZ = 99 CoastingSpeed = 20 CoastingFriction = 50 PressureMotionMinZ = 14 PressureMotionMaxZ = 79 PressureMotionMinFactor = 1 PressureMotionMaxFactor = 1 ResolutionDetect = 1 GrabEventDevice = 1 TapAndDragGesture = 1 AreaLeftEdge = 0 AreaRightEdge = 0 AreaTopEdge = 0 AreaBottomEdge = 0
Best Answer
First of all, to identify which touchpad you have, run
If it shows something like
then you most probably do not have multitouch support. The Alps touchpads tend not to have multitouch, while they use the same driver as the Synaptic touchpads.
You can use
synclient -l
to obtain information on your touchpad.Still, the definitive way to see how many fingers are supported on your touchpad, is to
synclient -m 100
, which will show in real time the status of your touchpad. The fifth column labeledf
is for fingers, therefore you can see up to how many fingers you can tap at the same time.To enable SHMConfig in xorg.conf, see http://mjg59.livejournal.com/118588.html and then add
to your xorg.conf. You can remove the above snippet once you performed your testing.