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After installing Ubuntu 12.04 I have edited /etc/default/grub and changed the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" 

to

GRUB_CMDLINE_LINUX_DEFAULT=""

then run

# update-grub2

Upon reboot I am not seeing the kernel messages printed to screen as expected. I only see a blank purple screen.

What else needs to be configured for grub to display kernel messages upon boot ?

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1 Answer 1

up vote 1 down vote accepted

I've seen this happen when the framebuffer text mode isn't properly supported. Uncomment the line:

#GRUB_TERMINAL=console

(remove the #) and run update-grub as superuser again. So it should read:

GRUB_TERMINAL=console

If you expect to see GRUB2 itself, make sure to adjust the timeouts.

Note: this will give you the classic 80x25 text mode instead of the framebuffer text mode with higher resolution.

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80x25 text mode works for now. Thanks. –  James P Mar 23 '13 at 8:14

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