I was not able to use the suggested kernel due to UEFI/SecureBoot. However, after edit "/etc/default/grub" and change GRUB_CMDLINE_LINUX_DEFAULT to GRUB_CMDLINE_LINUX_DEFAULT="quiet i8042.nopnp=1 pci=nocrs", touchpad started to work.
OBS: Suggestion taken from: https://askubuntu.com/questions/1220264/lenovo-ideapad-s145-touchpad-not-working
I was not able to use the suggested kernel due to UEFI/SecureBoot. However, after edit "/etc/default/grub" and change GRUB_CMDLINE_ LINUX_DEFAULT to GRUB_CMDLINE_ LINUX_DEFAULT= "quiet i8042.nopnp=1 pci=nocrs", touchpad started to work.
OBS: Suggestion taken from: https:/ /askubuntu. com/questions/ 1220264/ lenovo- ideapad- s145-touchpad- not-working