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How do I individually change the horizontal and vertical acceleration of the cursor? I can scroll side-to-side in a single stroke on a 1600x900 monitor on my laptop, but I can never do that vertically. Furthermore, the touchpad seems to be too sensitive horizontally (I hold my index finger still, but the cursor subtly moves)... is this fixable?

I'm using a Synaptics touchpad.

htorque
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user541686
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    Having this same problem with an Apple Magic Trackpad and dual monitors in TwinView configuration at 3200x1600. Horizontal movements too sensitive compared to vertical ones; making a circle on the pad results in a wide horizontal oval movement on the screen. – rymo Jun 27 '11 at 20:05

1 Answers1

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Solution for Ubuntu 11.04:

Add the options

Option "VertResolution" "75"
Option "HorizResolution" "75"

To the file /usr/share/X11/xorg.conf.d/50-synaptics.conf.

After doing that, mine looks like:

Section "InputClass"
    Identifier "touchpad catchall"
    Driver "synaptics"
    MatchIsTouchpad "on"
    MatchDevicePath "/dev/input/event*"
    Option "VertResolution" "75"
    Option "HorizResolution" "75"
EndSection

Now log off and log back in, and it should be fine! :)

user541686
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  • That works for two screens for me! – Henrik Dec 15 '11 at 14:04
  • Are there any new solutions to this question? Say for Ubuntu 13.10? – TheRookierLearner Apr 18 '14 at 04:16
  • @TheRookierLearner: You could try to play around with settings by using the program xinput, maybe it'll work for you. – user541686 Apr 18 '14 at 04:39
  • It's ten years later and dual monitors still screws with touchpad behavior. Not really able to comprehend why a decade of countless posts wasn't enough to get this extremely obvious issue taken care of... – J23 May 23 '21 at 03:10
  • @Metal450: I don't think my question had anything to do with dual-monitor setup? – user541686 May 23 '21 at 03:12
  • Oops, apologies if I misinterpreted then - I've spent the past ~2hrs reading about this exact behavior, as caused by dual monitor setups (when you plugin a 2nd monitor, which increases the width of the 'virtual display', it doubles the touchpad's horizontal speed, making it unusable). i.e. https://superuser.com/questions/308966/touchpad-sensitivity-scales-to-virtual-screen-dimensions. So they're closely related, but I guess your issue was more generally about applying screen width to touchpad sensitivity. In my case, the issue appears when I plugin the 2nd monitor. – J23 May 23 '21 at 05:38
  • @Metal450: Haha yeah they could be related, not sure. In my case I just find the pointer ballistics awful on Linux. – user541686 May 23 '21 at 06:24
  • For me, they were perfect (working on a small laptop) until I plugged in a 2nd screen. The 2nd screen made the horizontal resolution 2x, which made the pointer go crazy. So yeah, it's kinda the same issue: it should work properly regardless of resolution :/ – J23 May 23 '21 at 18:56