I have an ASUS X540UP 1TB hdd(Windows) & 250GB ssd(Ubuntu 18.04).
I installed ubuntu via USB Flash Drive at first installation process was okay and touchpad is working.
But when booting to installed Ubuntu OS I had difficulties, hence resorted to adding
acpi=off in GRUB file. Now I use Ubuntu with external mouse.
I would like to use the touchpad, but when removing
acpi=off I can boot to login screen and touchpad is working but after logging in it freezes (purple screen). Is there a way to make touchpad work even if
acpi=off is added. Thanks