creo que serán buenas noticias, la cosa es que estos cambios están solo en slackware current ....
dispongo de iso ... "current"

ya te subo alguna iso para que pruebes..antes debo aclrarme con que cosas debo tocar/actualizar etc del sistema xorg-server
x/libinput-1.5.4-x86_64-1.txz: Added.
x/libwacom-0.22-x86_64-1.txz: Added.
This is needed for libinput.
x/xf86-input-libinput-0.23.0-x86_64-1.txz: Added.
This is the new generic X.Org input driver which replaces evdev for most
purposes. It does not (for now) replace xf86-input-synaptics or
xf86-input-vmmouse. If this driver package is missing then X will fall
back to using xf86-input-evdev as before.
Thanks to Robby Workman.
x/xorg-server-1.19.1-x86_64-2.txz: Rebuilt.
Rename 90-keyboard-layout.conf to 90-keyboard-layout-evdev.conf.
x/xorg-server-xephyr-1.19.1-x86_64-2.txz: Rebuilt.
x/xorg-server-xnest-1.19.1-x86_64-2.txz: Rebuilt.
x/xorg-server-xvfb-1.19.1-x86_64-2.txz: Rebuilt