There are a few ways to disable the touchpad in Windows. Since you use Mint, obviously those won't work. I suspect that there is no such setting in your BIOS. I don't have a E6400 to test, but I have a couple of Dell laptops here that are almost as old, and their BIOS has no such setting. My Mint laptop isn't here at the moment, so I can't check it for you. From what I recall, in Mint settings for mouse/touchpad there is a toggle to disable touchpad when a mouse is attached. You would enable that setting. I read that of an app, touchpad-indicator, that displays an control that allow you to disable or enable the touchpad. [URL] ... 18-04-lts/ Otherwise, you would be better served by asking at a Mint forum.
I have a Dell Latitude E6400 laptop and have just installed a SSD in place of the HDD and updated to Linux Mint 21.1. I’ve been configuring everything like I wish and have come up against an old problem that I have previously failed to fix. BIOS revision is A30. I wish to disable the Trackpoint and Touchpad. I have entered BIOS and do not see a choice which will let me make the desired changes there. Am I missing something? Can I disable those inputs through BIOS? How? Or do I need to do this through Linux? Thanks! Wayne
Latitude E6400 Disable Trackpoint and Touchpad