I was following this instructions with Ubuntu 14.04. https://github.com/he1per/psmouse-dkms-alpsv7 and psmouse serio1: alps: Unknown ALPS touchpad in a Lenovo Ideapad Flex 15 And after many tries I received the following error message: root@alisson-Lenovo-Ideapad-Flex14:/tmp/psmouse-dkms-alpsv7# ./install.sh ------ Building with dkms ------- Error! DKMS tree already contains: psmouse-dkms-alpsv7-1.0 You cannot add the same module/version combo more than once. Module psmouse-dkms-alpsv7/1.0 already built for kernel 3.13.0-24-generic/4 ------ Installing with dkms ------- Module psmouse-dkms-alpsv7/1.0 already installed on kernel 3.13.0-24-generic/x86_64 ???? Error: dkms install failed:\n '/usr/lib/modules/3.13.0-24-generic//updates/psmouse.ko' not found. root@alisson-Lenovo-Ideapad-Flex14:/tmp/psmouse-dkms-alpsv7# than, searching for "psmouse.ko": alisson@alisson-Lenovo-Ideapad-Flex14:~$ locate psmouse.ko /lib/modules/3.13.0-24-generic/kernel/drivers/input/mouse/psmouse.ko /lib/modules/3.13.0-24-generic/updates/dkms/psmouse.ko /var/lib/dkms/psmouse-dkms-alpsv7/1.0/3.13.0-24-generic/x86_64/module/psmouse.ko /var/lib/dkms/psmouse-dkms-alpsv7/1.0/build/src/.psmouse.ko.cmd /var/lib/dkms/psmouse-dkms-alpsv7/1.0/build/src/psmouse.ko alisson@alisson-Lenovo-Ideapad-Flex14:~$ What should I do?