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Tag : boot  
Link: 🔍 See Original Answer on Ask Ubuntu 🔗

URL: https://askubuntu.com/q/1105656
Title: Black screen beteen GRUB and login screen
ID: /2018/12/30/Black-screen-beteen-GRUB-and-login-screen
Created: December 30, 2018    Edited:  June 12, 2020
Upload: November 24, 2022    Layout:  post
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To see what is happening during the 20 to 30 seconds use:

sudo -H gedit /etc/default/grub

Find the line that starts with:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash

and change it to:

GRUB_CMDLINE_LINUX_DEFAULT="noplymouth

Leave the rest of the line as is.

Now save the file and exit gedit

Run:

sudo update-grub

Now when you reboot you will see the messages scroll by as the kernel boots up. If it gets stuck on one message for more than a second note it and add it to your question.

For a detailed time break down of your boot use:

systemd-analyze blame

The longest running boot commands are listed first. Use Q to exit the command.


Systemd log messages

After completing above steps this error is revealed during boot up:

WARNING: Failed to connect to lvmetad. Falling back to device scanning.

Arch Linux references this error here.

Unix & Linux describes LVM setup errors here.

⇧ Cronjob not executing, but command works Ubuntu 18.X and 16.X boot time take an hour or more from dual boot laptop  ⇩