Wubi fails to boot. User dropped to a grub shell

Bug #746257 reported by Jean-Baptiste Lallement on 2011-03-31
This bug report is a duplicate of:  Bug #742967: Wubi grub prompt on install. Edit Remove
This bug affects 2 people
Affects Status Importance Assigned to Milestone

Bug Description

ISO Testing: Ubuntu Desktop 20110330 / Wubi r205

1. Install Ubuntu with Wubi
2. After phase 2 of the installation the system reboots
3. Select 'Ubuntu' at the ntloader prompt

Grub shell

Changed in wubi:
status: New → Confirmed
tags: added: iso-testing
bcbc (bcbc) wrote :

I think this is probably the same as bug 742967. I thought at first it had something to do with my install being on a non-windows partition, but I've been suspecting that the partition part was just coincidence and timing as grub was modified between my test installs. Anyway - there is some analysis there about new sections of grub.cfg that may be useful.

This is the section of grub.cfg that differs from a lucid 10.04.2 grub:
function load_video {

insmod part_msdos
insmod ntfs
set root='(/dev/sda,msdos3)'
search --no-floppy --fs-uuid --set=root 8654915254914639
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=auto
  insmod gfxterm
terminal_output gfxterm

I find if I remove the bit from "insmod part_msdos" to "set root=(loop0)" it boots fine.

Colin Watson (cjwatson) wrote :

Yes, I think it probably is the same. Duplicating.

Maddy (nmadhava) wrote :

One question here,
I have install Ubuntu 10.10 using WUBI and if I upgrade to 11.04 will I hit the same problem?

Madhava N

Arkangyl (arkangyl) wrote :

If you've installed Ubuntu 10.10 using WUBI and upgrade to 11.04 you will hit the same problem. I have tested this on a machine running Windows 7.

Maddy (nmadhava) wrote :

Yes, this seems an issue with GRUB and is being fixed as part of #742967

Tushar Jain (tushaar-iitr) wrote :

I have done the same.. as I am using windows also... and use the windows loader to boot ubuntu.....

I had a ubuntu10.10 but after upgradation the things went worst... so I took a backup .. did a fresh install of 10.10 and then upgrade to 11.04... restore the backup... everything works fine for me.. :)

Jose L. (chilexican) wrote :

I've used wubi and installed 10.10 and upgraded directly to 11.04 without any issues, my windows operating system is windows 7 64 bit im not sure whether this would be any reason why im not having any issues but everything seems fine.

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