In my case (Latitude 5591 laptop) it was "DELL0819:00 044E:121F Mouse" with "id=13" and disabling it with xinput -disable 13 helped. In addition to fine answer of Gabriel Staples I'd like to mention that in newer Dell laptop models xinput's output may not contain any sign of "stick" or "ALPS" or something related to pointing stick.
And thanks to Zundel for his comment below my answer too. Thanks to answer for first getting me on the right track by informing me about xinput. See my touchpad_toggle.sh script in my dotfiles project. But, adding it to the "Startup Applications" as I explain above does work. In either case, I couldn't get it to work that way, even with adding sleep 10 before the command. See here: Why won't rc.local run xinput?. Note: if you think you can place this command in /etc/rc.local instead, to run at startup, it probably won't work since xinput requires the X Window System to be running. He recommends you use the following command instead, to ensure that it always works even if the device ID number changes: xinput -set-prop "AlpsPS/2 ALPS DualPoint Stick" "Device Enabled" 0.ĭone! Now it will run this script every time you reboot, thereby automatically disabling it again. See also the comment under this answer from Brent Zundel. Put your disable command from above (ex: xinput -disable 15) into the "Command" box, and anything you want into the "Name" and "Comment" boxes. 
Click "Add" to add an additional startup program. Open the "Startup Applications" program in Ubuntu. 
Now the problem is that our change above is not persistent across reboots. OR xinput -set-prop "AlpsPS/2 ALPS DualPoint Stick" "Device Enabled" 1 If you'd ever like to re-enable it, try the following: xinput -enable 15 You might also try the following, as recommended by Brent Zundel in his comment under this answer: xinput -set-prop "AlpsPS/2 ALPS DualPoint Stick" "Device Enabled" 0 Take note of its id number (15 in my case), then use that in the next command: Mine is the 7th line down: ⎜ ↳ AlpsPS/2 ALPS DualPoint Stick id=15 The key line we care about is the "DualPoint Stick". Open a terminal with Ctrl + Alt + T and type: How to disable the trackstick in Dell laptopsĢ Commands to disable it, and 1 additional step to make this persistent across reboots:
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