To make the change permanent, do the following:
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enter the terminal and type “sudo nano/etc/default/grub”
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find the line that starts with: “GRUB_CMDLINE_DEFAULT =” quiet … "you go to the end of the line and add "pci=nocrs "
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press “Ctrl + x” it asks you to save and you give it “Yes”, and then return button
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then run “sudo update-grub”
And voila, enjoy the touchpad.
What we did is modify the reference file to configure GRUB, and update so that it takes the modifications.