Comment 68 for bug 1822394

A very similar bug has started affecting me since I upgraded to Ubuntu 20.04.

On my laptop (Dell XPS 15 9560) I am unable to decrypt my harddrive because the keyboard is unresponsive so I can't enter the password.

I have found a workaround for that issue, which is to boot in recovery mode (the keyboard works in the grub menu), then drop to a root shell and run `reboot`. Upon reboot the keyboard works and lets me decrypt the drive and log in.

It does not work to enter the grub menu and choose normal boot, nor does it work if I do a hard reboot after booting in recovery mode.

During a Gnome session the keyboard and touchpad will occasionally become unresponsive as well. The workaround here is to press the power button - this brings up the logout dialog, which causes the touchpad and keyboard to work again.