Plymouth and lightdm

If plymouth does not show (purple screen) after nvidia drivers install


In /etc/default/grub
set
GRUB_GFXPAYLOAD_LINUX="keep"


And in /etc/initramfs-tools/conf.d/splash

set

FRAMEBUFFER=y

If you want to check the video resolution, vbeinfo does not work anymore, use

videoinfo


at the GRUB terminal (loaded by pressing C)


To changhe plymouth theme from GUI:

  plymouth-manager

 https://launchpad.net/plymouth-manager


To enable the automatic background for lightdm

dconf  
and set org.gnome.settings-daemon.plugins.background to active


sources:


http://onetransistor.blogspot.jp/2016/03/plymouth-fix-nvidia.html
http://askubuntu.com/questions/577486/how-do-i-run-vbeinfo

http://askubuntu.com/questions/449677/how-do-i-set-the-lightdm-wallpaper-in-ubuntu-14-04