After apt upgrade, I have problems with booting into the system.

Firstly, I was getting the message that Plymouth was missing and Bluetooth failed to initialize. After installing Plymouth theme I only get the Bluetooth error.

The picture is attached: How could I solve this issue?

enter image description here

I also have tried to install over other display managers like sddm, but I get black screen after grub.

I can get to the shell through Ctrl+Alt+F2

The result of inxi:

enter image description here

Edit after reinstall of lightdm:

At boot: enter image description here

lightdm.service:enter image description here

  • I will definitely switch, but now I need to boot into the system.
    – serj
    May 1, 2018 at 7:22
  • Lightdm was giving an error that it can not find /sbin/polymouthd and after reinstall of polymouth remain only error with Bluetooth but I couldn't boot either. Than I tried to install sddm and now I have clean black screen :)
    – serj
    May 1, 2018 at 8:16
  • I have updated my question with pictures results.
    – serj
    May 1, 2018 at 8:33
  • No it does not change anything.
    – serj
    May 1, 2018 at 9:08
  • Yes and I get result from 3rd image in my question
    – serj
    May 1, 2018 at 9:12

1 Answer 1


As per the comments:

cat /etc/lightdm/lightdm.conf

resulting in:

No such file or directory

Just create the following file with your favorite editor, use nano, if unsure:


with contents:


and reboot.

Please run:

sudo apt-get install slick-greeter lightdm lightdm-settings apparmor

and reboot.

You can add an explicit directive to the new Slick Greeter by adding this line to the above config:

  • Same result with /sbin/plymouthd not found and /bin/plymouth: not found as in33rd picture
    – serj
    May 1, 2018 at 10:31
  • plymouthd is not important, does it let you log in now? If not, try to run again dpkg-reconfigure lightdm and then startx, what is the output. May 1, 2018 at 10:43
  • @serj Please see the edit I just made. May 1, 2018 at 11:00
  • So after installation and ddpkg-reconfigure I have run startx and gui appeared different one that I had but at least something but after every restart again error with Plymouth not found and only after startx gui appeared
    – serj
    May 1, 2018 at 12:25
  • @serj So, case solved, or not yet? May 1, 2018 at 12:29

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