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I'm running Ubuntu 14.04 with gnome 3.9.90. After a standard program update two weeks ago my keyboard stopped working only in the login screen. As a workaround I log in using the screen keyboard. When I'm logged in everything works fine. I've tried to boot in recovery mode and with older kernel, but it's the the same result.

Any suggestions how to fix/debug this?

2 Answers2

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Solution for 16.04.

Run sudo apt-get install --reinstall xserver-xorg-input-all

edit /etc/default/grub and change GRUB_CMDLINE_LINUX_DEFAULT to have the value atkdb.reset i8042.nomux quiet splash and then run sudo update-grub and reboot.

Here's the answer that helped me - https://askubuntu.com/a/817999/623268

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Maybe try working through these solutions? They are for problems after coming back from suspend, but maybe a start.

14.04 - Keyboard does not work in login screen after sleep

Keyboard and mouse unresponsive after suspend

ohnoplus
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