Whats is the importance of Plymouth?
Solution 1
What's wrong after uninstalling plymouth
?
Removing Plymouth also removes the display manager, e.g. lightdm
and/or gdm
and a little bit more. Here is a snippet of the remove command on my system:
sudo apt-get remove --simulate plymouth
[…]
The following packages will be REMOVED:
cryptsetup gdm lightdm mountall plymouth plymouth-label plymouth-theme-ubuntu-gnome-logo plymouth-theme-ubuntu-gnome-text plymouth-theme-ubuntu-logo plymouth-theme-ubuntu-text ubuntu-desktop ubuntu-gnome-desktop unity unity-greeter unity-tweak-tool upstart
upstart-bin
[…]
That's the reason, why you don't have a login screen anymore.
An advice to revert the mistake
You can always login on tty1 and reinstall lightdm
/gdm
and the other removed packages like ubuntu-desktop
and upstart
. An overview of the removed packages can you find in /var/log/dpkg.log
. In my example I would have to reinstall
sudo apt-get install gdm lightdm ubuntu-desktop upstart ubuntu-gnome-desktop unity unity-tweak-tool
After that start your display manager, e.g.
sudo service gdm start
or
sudo systemctl start gdm
What is Plymouth?
Plymouth is an application that runs very early in the boot process (even before the root filesystem is mounted!) and provides a graphical boot animation while the boot process happens in the background.
Source: apt-cache show plymouth
… and Plymouth replaces usplash
.
Find more about Plymouth here.
Solution 2
From Wikipedia:
Plymouth is a bootsplash (a graphical representation of the boot process of the operating system) for Linux. It supports animations. It makes use of Direct Rendering Manager (DRM) and KMS driver. It gets packed into the
initrd
.Besides eye-candy, Plymouth also handles user interaction during boot.
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LeoSantana
Updated on September 18, 2022Comments
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LeoSantana over 1 year
I accidentaly did a command to delete Plymouth from my ubuntu 15.04:
sudo apt-get remove plymouth
and after this my login screen didn't appear any more. After GRUB menu the screen became black and nothing seems to happen. I installed Ubuntu again but the question remains on my mind: What is Plymouth and why it crashed my system?
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LeoSantana over 8 yearsYes, now I understand. There was a way to undo Plymouth removal? Or may do login in other way?
-
A.B. over 8 yearsYou can always login via tty1 and so on and reinstall
lightdm
/gdm
and the other removed packages likeubuntu-desktop
andupstart
. -
A.B. over 8 yearsAnd if you understand it, then you could mark the question as answered with a click on the check mark at the left side of the answer ;)
-
heemayl over 8 yearsA.B.:
lightdm
&gdm
are display managers, not window manager..otherwise this is a good answer.. -
heemayl over 8 yearsNo problem..have my upvote now :)
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We are Borg over 8 yearsI only upvoted because you recommended to search on net/wiki.. :D