Ubuntu – Updated from 16.04 to 16.10; the keyboard and mouse no longer works after getting to the lock screen


So I just updated to 16.10 (just got 16.04 a few weeks ago, still new to Linux). The keyboard still works when I need to enter my password to unencrypt the lvm drive, but stops working (along with the mouse) when I get to the login screen. Is this a known problem? How do I fix this?
By the way this is installed on a lenovo think pad.


Edit: got home and tried connecting a usb keyboard. Does not work (again only after reaching the login screen) . What on earth is going on?

Best Answer

I had the same issue today and found this bug report.

The problem seems to be, that during update process they forget to install/update the package xserver-xorg-input-all!

So these instructions worked for me on my thinkpad p51s notebook with a little modification:

  1. Press a Shift key during boot to get the GRUB menu.
  2. In GRUB, select Advanced Options, then the first kernel with the recovery mode.
  3. Select "Network" to get network access (needed for package installation)
  4. Select "Drop to root shell"
  5. Press Enter to confirm.
  6. On my system not needed because, the filesystem was mounted rw, but if needed then mount -o rw,remount /.
  7. Install the needed package: apt install xserver-xorg-input-all (and the message that they need to uninstall 16.04 packages!)
  8. Press Ctrl+D to leave the root shell.
  9. Select resume boot from the menu.
  10. Now I could only log into console.
  11. sudo reboot

After reboot my ThinkPad's mouse and keyboard and the external mouse and keyboard worked fine!

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