Consider using libinput drivers

[jpouellet]

I would like to suggest using xorg-x11-drv-libinput due mainly to its significantly improved inertial scrolling handling.

Qubes OS version (e.g., R3.1):

R3.2, but perhaps all

Affected TemplateVMs (e.g., fedora-23, if applicable):

dom0

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Expected behavior:

Under synaptics drivers, scrolling to the bottom of a web page, then pressing control-tab (or control-anything) causes firefox and chrome to zoom the current page because it is still receiving wheel-down events from (unintended) intertial scrolling, which are now combined with the control key, and this is a (not-easily-disableable) shortcut for page zooming in at least firefox and chrome.

Actual behavior:

Web pages randomly zoom in and out all the time, in greatly maddening fashion.

Steps to reproduce the behavior:

With active browser window, quickly swipe up or down with two fingers to initiate scrolling, then remove hand from touchpad, and press control key.

If your driver exhibits this issue, you almost certainly already know what I'm talking about.

General notes:

This behavior keeps getting reported to browsers, but it's not browsers' fault.

• https://bugs.chromium.org/p/chromium/issues/detail?id=253697
• https://bugs.chromium.org/p/chromium/issues/detail?id=178972
• https://bugs.chromium.org/p/chromium/issues/detail?id=254612

The libinput drivers already get installed if you choose to install KDE in the installer.

xorg-x11-drv-libinput can safely be installed alongside xorg-x11-drv-synaptics, and X11 will prefer libinput. Although, I'm not sure why you'd want to keep the synaptics drivers around...