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I've installed Ubuntu 10.04 server edition and want to enter the recovery mode.

After reboot the system, it directly enter the login window, no grub screen shows.

If I click esc when booting the system, it stops loading and shows a blinking cursor infinitely.

What's the problem here? Is there some way to trouble shooting?

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2 Answers 2

I think you should be pressing Shift to go into recovery mode, not Escape.

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I can vouch for this, but would you know why Ubuntu has started hiding the Grub screen? –  TheLQ Jul 19 '10 at 17:20
    
I don't know why, but I find it actually a good idea. It is the sole OS on my PC and I don't want my start up to be slowed down by waiting for me to choose from a single "normal" boot option plus recovery, as I am only likely to choose recovery mode in less than 1% of boots. –  rumtscho Jul 19 '10 at 17:57

Open a terminal and edit /etc/default/grub:

$ sudo nano /etc/default/grub

Change the lines:

GRUB_HIDDEN_TIMEOUT=10
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=0

to:

#GRUB_HIDDEN_TIMEOUT=10
GRUB_HIDDEN_TIMEOUT_QUIET=false
GRUB_TIMEOUT=10

Note that the original values may be different. When you're done editing, save the file and run:

$ sudo update-grub

Reboot and you should see the grub menu.

More information about grub in Ubuntu is available here.

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Thanks elmugrat, but the problem is that I can't sudo, that's why I want to enter the recovery mode. I've mistakenly removed myself from sudoers –  Johnny Jul 19 '10 at 10:06
    
and my current /etc/default/grub says: GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 –  Johnny Jul 19 '10 at 10:08
    
Oh ok. When the screen says "Grub loading..." or something like that and there's a countdown, hit escape and it should bring the menu up. –  Brian Kintz Jul 19 '10 at 10:23

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