Boot - Black screen with purple border

[tiaborrelli]

Hi, i have a problem when i boot the pc.
After the installation of Ubuntu a black screen with a purple box appeares without let me see the choice of GRUB, then the screen becomes black and Ubuntu starts booting.
Ubuntu is the only OS installed but it's quite annoying can't see the option of the bootloader.

Can anyone help me?

[ben-schweitzer]

The screen is most likely just processes starting. Try holding shift before the purple screen to see the GRUB menu.

[tiaborrelli]

I tried that this afternoon and it showed me the processes starting, but now holding shift seems not working.

[jeremy31]

If it is a laptop, try using the FN shortcut to increase the display brightness or plug in an external monitor if you have one

[tiaborrelli]

Yes i have a laptop but it doesn't work FN + brightness, sadly now i can't plug in an external monitor.
I'll try tomorrow. Any other suggestions?

[MirkoCe]

To show grub menu


gksu gedit /etc/default/grub

and edit the following like that (don't forget the #)


#GRUB_HIDDEN_TIMEOUT=0
GRUB_TIMEOUT=4

You can change 4 with whatever you like.

then do


sudo update-grub

that should be all.

[tiaborrelli]

Thank you! That solved the problem!

[KillEmAllx]

To show grub menu


gksu gedit /etc/default/grub

and edit the following like that (don't forget the #)


#GRUB_HIDDEN_TIMEOUT=0
GRUB_TIMEOUT=4

You can change 4 with whatever you like.

then do


sudo update-grub

that should be all.

I have the same problem, black boot screen with purple frame. How do I fix it without turning grub on? Ubuntu is the only OS on my laptop, so I don't really need grub.
Also, anyway to make the purple stuff black?

[MirkoCe]

Hello,
I also changed my grub to black as I had the same problem. Just do



sudo -H gedit /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.grub


And change to



if background_color 0,0,0 ; then
clear
fi

then


sudo update-grub

Tell me if it worked!