Keyboard and touch pad not recognized in login screen

[dowens76]

I have a Dell XPS 13 9380. I have been happily using Elementary OS 5.1 for the past two weeks. Today I left my computer and came back to find that I could not do anything on the login screen. Neither the touch pad nor the keyboard are recognized, so I cannot login. I am able to get to a root shell using the advanced boot options, and there the keyboard is recognized. Not sure if this is a bug or not, but it seems buggy to me.

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[dowens76]

For what it's worth, based on directions from https://techwiser.com/fix-keyboard-not-working-in-ubuntu-18-04/, I resolved this issue by:

First, booting into a live USB and manually downloading two packages:

• xserver-xorg-input-libinput_0.27.1-1_amd64.deb
• xserver-xorg-input-all_7.7+19ubuntu7_amd64.deb

  Second, selecting advanced boot options and entering a root shell and installing those two packages.

I am not sure why Elementary stopped recognizing my keyboard and touchpad. The packages seem pretty basic.