How do I disable mouse acceleration for my mouse but keep in enabled for my touchpad?

Question

as the questions says I want to disable mouse acceleration for my mouse, but keep it for my touchpad. I use a fresh install of Ubuntu 15.10 with unity. Can someone help?

Answer 1

There are several utilities for playing with mouse acceleration (for example, xset m changes all connected devices and xinput --set-ptr-feedback <device> changes a specific device; see the xset and xinput man pages for further details), but these settings will be lost on reboot.

A more permanent solution would be to create a new file in /usr/share/X11/xorg.conf.d/ called something like 60-mouse-no-accel.conf with the following content

# Remove acceleration from actual mice (but not touchpads, etc)

Section "InputClass"
    Identifier "Disable mouse acceleration"
    MatchIsPointer "on"
    MatchDevicePath "/dev/input/event*"

    # Set mouse acceleration.  Defaults to 2/1 4
    # Query using xset q | grep -A 1 Pointer
    # Set using xset m 2/1 4
    #  or using xinput --set-ptr-feedback <device> 4 2 1
    # Set acceleration to zero to disable
    Option "AccelerationNumerator" "0"
    Option "AccelerationDenominator" "1"
    Option "AccelerationThreshold" "4"
EndSection