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After upgrading to 18.04 the login prompt on my laptop acts really strange:

It wait's for the input of the user name and after pressing ENTER it behaves as if the ENTER key is stuck and gives no chance to enter the password.

Here is a picture:

defect login prompt

The exact step that happen are as following:

1. It shows the normal login prompt

Ubuntu 18.04.1 LTS computername tty1

computername login: _

2. It wait's for the input of the username and until you entered the username it behaves normally.

3. As soon as you press ENTER to confirm the username it immediately goes on to

Password:

Password:

Login incorrect.

Without waiting for any user input.

So there is no chance to login to this PC anymore?!

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7
  • Did you update any GPU drivers? such AMD or Nvidia? If so, you have to install the nvidia/AMD xorg server for each of these.
    – falconR
    Feb 4, 2019 at 11:31
  • @Ronald To be honest I don't know what was updated - a few thousand packages as usual in a relase upgrade ... but how should I be able to install these packages, if I can't even login on the shell? (The problem is similar on the GUI btw, it acts normally but won't let you log in.)
    – s1lv3r
    Feb 4, 2019 at 11:36
  • This is a known bug introduced with kernel 4.15.0-44-generic. Try to go back to kernel *-43, at least temporarily until a fix is published. Bugreport on launchpad: bugs.launchpad.net/bugs/1812095
    – PerlDuck
    Feb 4, 2019 at 11:44
  • @s1lv3r as PerlDuck said, looks like it's a bug. It happened this me once in Ubuntu and somehow the nvidia drivers installed normally, but not the xorg nvidia driver, so i have to log in into that console and install it from the repositories: sudo ubuntu-drivers autoinstall
    – falconR
    Feb 4, 2019 at 11:58
  • 1
    Thank you very much Ronald and PerlDuck for the fast support. :-) The login issue on the TTY was really this kernel bug. It works with the older versions. Not beeing able to login via GUI seems to be a totally separate issue, the dist upgrade seems to be botched somehow - still working on that one, but atleast I have a shell to work with now.
    – s1lv3r
    Feb 4, 2019 at 13:26

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