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This question has been answered before, but neither of the methods in the accepted answer worked for me on 11.10.

First I tried editing in /etc/default/grub, and then running sudo update-grub. But after that I still got a blank, plain, purple screen while the kernel is loading. The screen has no boot options, and it obscures those dmesg that I want to see going in the terminal.

Next I tried removing the plymouth-theme-*, but that just broke my gnome-shell theme looks, and the purple screen still remains.

I have also tried configuring it with startupmanager package, but nothing seems to get rid of that darned purple splash.

here are the contents of my /etc/default/grub file:

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`"

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)

# Uncomment to disable graphical terminal (grub-pc only)
#    GRUB_TERMINAL="console"

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux

# Uncomment to disable generation of recovery mode menu entries

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

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up vote 3 down vote accepted

Try this

sudo mv /etc/init/plymouth.conf /etc/init/plymouth.conf.disabled
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Uncomment #GRUB_TERMINAL=console from /etc/default/grub.

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Grub loads its background color from /lib/plymouth/themes/default.grub (as seen in /etc/grub.d/05_debian_theme).

I don't know the standard way of changing this color, but editing /lib/plymouth/themes/default.grub worked for me:

if background_color 0,0,0; then

Then, from the commandline, type sudo update-grub

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