Touchpad problems?

To change the behavior of the Synaptics / Alps touch pad, use Control Panel - Desktop - Adjust Touch Pad. If Adjust Touch Pad errors when you launch it, your touch pad is probably not supported yet, see synaptics below.

By default "tap-to-click" is disabled as some touchpads are overly sensitive, making the system impossible to use if it is left on. To turn it back on:

  1. Open Adjust Touchpad control from within Control Panel (under Desktop tab)
  2. Check the checkbox next to "Enable tap-to-click".
  3. Then click apply.
Vertical scrolling is by default enabled, using "two finger" method (touch the touchpad with one finger, then use another finger to touch and move on the touchpad). This of course requires multi-touch touchpad; and if you don't have one you need to use another method for scrolling. To change it, open Adjust Touchpad as above, and then look at the dropdown list for "Scroll Method" and choose another one which is suitable. Don't forget to click apply.

If Control Panel - Desktop - Adjust Touch Pad doesn't offer the option you want to adjust, you can do it manually by copying 50-touchpad-gui.conf to /etc/X11/xorg.conf.d/60-touchpad-override.conf. Renaming it with numbers starting with "60" means that whatever setting you specify here will override the settings you set with the "Adjust Touchpad" settings, so beware.

Initially this file (after the copy) will contain the following settings:
#DO NOT EDIT! Used by touchpad settings app.
 Section "InputClass"
 Identifier "libinput"
 Driver "libinput"
 MatchDevicePath "/dev/input/event*"
     Option "AccelSpeed" "0.00"
     Option "DisableWhileTyping" "false"
     Option "HorizontalScrolling" "false"
     Option "LeftHanded" "false"
     Option "MiddleEmulation" "false"
     Option "NaturalScrolling" "false"
     Option "ScrollMethod" "twofinger"
     Option "Tapping" "false"
     Option "ClickMethod" "buttonareas"
First order of business is to change the identifier from "libinput" to "libinput-override". You can remove the comment on the first line too since we're editing a copy (not the original file) so that warning is not applicable.

Then you can change any other properties and settings. After editing, save the file, and you must restart the X server for changes to take effect.

Here's a couple popular options to adjust :

If you need more configuration options, take a look at the man page for xf86-input-libinput.

If libinput doesn't support your touchpad, use the Gslapt package manager to install xf86-input-synaptics and flSynclient then restart X. Synaptics  is an older driver for touchpad and may not work properly for newer devices; however if your hardware is old it may support it better than libinput (or not - you just have to try). It also has a lot more options. Use flSynclient to control its settings. If you don't like it, you can always uninstall it and Xorg will automatically revert to using libinput.

Synaptics can also be configured using a configuration file like above. You can find the details for synaptics driver here.