DISCLAIMER: I'm new to Ubuntu (18.04 - no dual boot).
I'd like to remove all colored screens after booting and turning off (while not seeing any code run on the screen) - also changing the login screen background to black (not lock screen).
After the manufacturer logo there's a second long purple screen. Then the screen totally turns off and after a second black screen the ubuntu loading screen shows up. Finally I can log in.
I searched for many questions and there are some thing I tried:
- Editing GRUB file - removing quiet splash/replacing to only quiet (I remember I could remove the splash, but then there was the code running on screen, so I'd like to change the color to black) - then updating grub
- Changing plymouth theme file to change the Window.SetBackgroundTop(Bottom)Color to (0,0,0) - this one hasn't changed anything I guess
- Creating a new plymouth theme and using a total black 1920x1080 image as background - haven't noticed any change, even tho the theme was used as alternative
Some of these changes messed with plymouth's Reboot and Power Off services and couldn't solve it, so I had to reinstall Ubuntu. I hasn't tried anything yet.
Is the first purple screen GRUB and the booting plymouth? I'm not sure..