gave waiting for device. common problems:
-boot args (cat/proc/cmdline)
-check root delay = (did the system wait long enough?)
-missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/by-uuid/48ceb088-20dq-4878-a852-8c289e910c9 does no exist.
Dropping to a shell!

busy v1.15.3 (ubuntu 1:1.15.3 ubuntu5)
built-inshell (ash)
Enter 'help' for a list of boult-in commons

(initramts)

                Boot Info Script 0.55    dated February 15th, 2010                   

============================= Boot Info Summary: ==============================

 => Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
    partition #5 for (,msdos5)/boot/grub.

sda1: _________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows XP
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  Windows XP
    Boot files/dirs:   /boot.ini /ntldr /NTDETECT.COM

sda2: _________________________________________________________________________

    File system:       Extended Partition
    Boot sector type:  -
    Boot sector info: 

sda5: _________________________________________________________________________

    File system:       ext2
    Boot sector type:  Unknown
    Boot sector info: 
    Operating System:  Ubuntu 10.10
    Boot files/dirs:   /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sda6: _________________________________________________________________________

    File system:       swap
    Boot sector type:  -
    Boot sector info: 

=========================== Drive/Partition Info: =============================

Drive: sda ___________________ _____________________________________________________

Disco /dev/sda: 320.1 GB, 320072933376 bytes
255 cabezas, 63 sectores/pista, 38913 cilindros, 625142448 sectores en total
Unidades = sectores de 1 * 512 = 512 bytes
Tamaño de sector (lógico / físico): 512 bytes / 512 bytes

Partition  Boot         Start           End          Size  Id System

/dev/sda1    *             63   459,234,089   459,234,027   7 HPFS/NTFS
/dev/sda2         459,234,151   625,137,344   165,903,194   f W95 Ext d (LBA)
/dev/sda5         459,234,153   623,081,024   163,846,872  83 Linux
/dev/sda6         623,081,088   625,137,344     2,056,257  82 Linux swap / Solaris


blkid -c /dev/null: ____________________________________________________________

Device           UUID                                   TYPE       LABEL                         

/dev/sda1        E0D03B70D03B4C52                       ntfs                                     
/dev/sda2: PTTYPE="dos"
/dev/sda5        48ceb088-28d9-4878-a852-8c289e9107c9   ext2                                     
/dev/sda6                                               swap                                     
/dev/sda: PTTYPE="dos"

============================ "mount | grep ^/dev  output: ===========================

Device           Mount_Point              Type       Options

/dev/sda5        /                        ext2       (rw,errors=remount-ro)


================================ sda1/boot.ini: ================================

[boot loader]

timeout=30

default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS

[operating systems]

multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect /tutag=2za9ef /kernel=tukernel.exe

C:\wubildr.mbr="Ubuntu"


=========================== sda5/boot/grub/grub.cfg: ===========================

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

function load_video {
  insmod vbe
  insmod vga
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos5)'
search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos5)'
search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
set locale_dir=($root)/boot/grub/locale
set lang=es
insmod gettext
if [ "${recordfail}" = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.35-25-generic' --class ubuntu --class gnu-linux --class gnu --class os {
   recordfail
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos5)'
   search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
   linux   /boot/vmlinuz-2.6.35-25-generic root=UUID=48ceb088-28d9-4878-a852-8c289e9107c9 ro noapic  quiet splash
   initrd   /boot/initrd.img-2.6.35-25-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-25-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
   recordfail
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos5)'
   search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
   echo   'Loading Linux 2.6.35-25-generic ...'
   linux   /boot/vmlinuz-2.6.35-25-generic root=UUID=48ceb088-28d9-4878-a852-8c289e9107c9 ro single noapic
   echo   'Loading initial ramdisk ...'
   initrd   /boot/initrd.img-2.6.35-25-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os {
   recordfail
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos5)'
   search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
   linux   /boot/vmlinuz-2.6.35-22-generic root=UUID=48ceb088-28d9-4878-a852-8c289e9107c9 ro noapic  quiet splash
   initrd   /boot/initrd.img-2.6.35-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
   recordfail
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos5)'
   search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
   echo   'Loading Linux 2.6.35-22-generic ...'
   linux   /boot/vmlinuz-2.6.35-22-generic root=UUID=48ceb088-28d9-4878-a852-8c289e9107c9 ro single noapic
   echo   'Loading initial ramdisk ...'
   initrd   /boot/initrd.img-2.6.35-22-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos5)'
   search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
   linux16   /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos5)'
   search --no-floppy --fs-uuid --set 48ceb088-28d9-4878-a852-8c289e9107c9
   linux16   /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
   insmod part_msdos
   insmod ntfs
   set root='(hd0,msdos1)'
   search --no-floppy --fs-uuid --set e0d03b70d03b4c52
   drivemap -s (hd0) ${root}
   chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

=============================== sda5/etc/fstab: ===============================

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
/dev/sda5       /               ext2    errors=remount-ro 0       1
/dev/sda6       none            swap    sw              0       0

=================== sda5: Location of files loaded by Grub: ===================


 266.1GB: boot/grub/core.img
 266.1GB: boot/grub/grub.cfg
 266.1GB: boot/initrd.img-2.6.35-22-generic
 266.0GB: boot/initrd.img-2.6.35-25-generic
 266.0GB: boot/vmlinuz-2.6.35-22-generic
 266.0GB: boot/vmlinuz-2.6.35-25-generic
 266.0GB: initrd.img
 266.1GB: initrd.img.old
 266.0GB: vmlinuz
 266.0GB: vmlinuz.old
=========================== Unknown MBRs/Boot Sectors/etc =======================

Unknown BootLoader  on sda5

00000000  f6 f6 f6 f6 f6 f6 f6 f6  f6 f6 f6 f6 f6 f6 f6 f6  |................|
*
00000200