GRUB2 in edit mode

[Camaleón <noelamac@gmail.com>]

Hello,

I am trying to get a more paused bootup messages by appending 
"boot_delay=1000" to the kernel line in GRUB2 edit mode (I'm adding this 
at the "linux" line, after "ro quiet"), but when I press F10 to continue 
with the boot sequence it hangs at:

***
(black screen)

Reading a command list

Loading Linux 3.0.0-1-686-pae ...
Loading initial ramdisk ...
***

And stays in there, I have to hard-reset the system to make it working 
again.

Any hints? Running wheezy here.

Greetings,

-- 
Camaleón