Failure to boot into Ubuntu (wubi)

[direwolf6]

Hi there

I recently installed ubuntu using wubi. Everything was going fine until I edited my /etc/default/grub file by adding radeon.audio=1 to the GRUB_CMDLINE_LINUX variable because my HDMI sound wasn't working.
When I unplugged the HDMI cable the screen went black and stayed like that. I then restarted my laptop and attempted to boot into ubuntu without success.
Resarting and trying a few times ended with different screens, one was blank, and sometimes I would get into the grub prompt.
I couldn't boot from the grub prompt following these instructions either http://ubuntuforums.org/showpost.php...7&postcount=33

I have tried four fixes to date in the following order
1. Replace the wubildr with a new file, didn't help my problems

2. I have tried solution #2 from: http://ubuntuforums.org/showthread.php?t=1639198

sudo mkdir /media/win 
sudo mount /dev/sda1 /media/win
sudo mount -o loop /media/win/ubuntu/disks/root.disk /mnt
sudo cp -p /media/win/wubildr /media/win/wubildr.save
sudo cp -p /media/win/ubuntu/winboot/wubildr /media/wi

3. I have tried solution #1 from the same link which causes the following on booting into ubuntu "Failre to load_video" "Could not load /lib/modules/3.2.0-24-generic/modules.dep"

sudo mkdir /media/win 
sudo mount /dev/sda1 /media/win
sudo mount -o loop /media/win/ubuntu/disks/root.disk /mnt
sudo cp /mnt/boot/grub/grub.cfg /mnt/boot/grub/grub.cfg.copy
sudo chmod +w /mnt/boot/grub/grub.cfg
gksu gedit /mnt/boot/grub/grub.cfg

Remove all lines in the file from the start of the file up to, but not including, the following menuentry

### BEGIN /etc/grub.d/10_lupin ###

4. I have used boot repair the output of which is here:
http://paste.ubuntu.com/1212958

I am at a loss as I have never used Linux before.
I don't have any important info on my ubuntu is it best to re-install and try a partitioned install? But then how do I get around the problem of Radeon not being recognized?

Thank you for your help

[blade4]

You could try reverting your grub file to its previous config :

sudo nano /etc/default/grub

and remove the line you added before your troubles began ,

sudo update-grub

But at this point I fear it would be more like a shot in the dark .

[YannBuntu]

Hello

You can try to fix your Wubi like this:

sudo mkdir /media/win 
sudo mount /dev/sda1 /media/win
sudo mount -o loop /media/win/ubuntu/disks/root.disk /mnt
gksudo gedit /mnt/boot/grub/grub.cfg

Remove the 'radeon.audio=1' occurrences, then save the file.
Reboot the PC, and tell us if you can boot Ubuntu. If yes, you will need to recover, from the WUbi session, the /etc/default/grub file.

Anyway, I don't recommend using Wubi as it is less reliable than a normal install. Please consider using a standard Ubuntu install instead of Wubi.

[direwolf6]

Thanks blade4, unfortunately when I do that the line I edited is no longer there. I'll try yannubuntu suggestion now.

[direwolf6]

Thanks yannbuntu but when I run

sudo mkdir /media/win
sudo mount /dev/sda1 /media/win
sudo mount -o loop /media/win/ubuntu/disks/root.disk /mnt

I get the error

/media/win/ubuntu/disks/root.disk: No such file or directory

I have made doubly sure that I have entered the right commands...

Edit1:
Ok, so it turns out that the grub folder was in sda3, is this going to be a problem? And how do I recover the etc/default/grub file from the wubi session?

Edit2:
When I reboot I came up to the grub prompt screen but I cannot boot into ubuntu this way as I get file not found errors when running

insmod ntfs
set root=(hd0,2)
loopback (loop0) /ubuntu/disks/root.disk #errors at this point#
set root=(loop0)
linux /vmlinuz root=/dev/sda1 loop=/ubuntu/disks/root.disk ro
initrd /initrd.img
boot

[direwolf6]

Now when I reboot I cannot boot into windows 7 when I previously could and get this error "an error occured while attempting to read the boot configuration data". Now I cannot choose to boot into ubuntu either. I have the windows installation DVD but that does not recognise my C drive when I try to repair using bootrec /fixmbrn from the command prompt.

What can I do from this point? Can I fix windows using the ubuntiu cd?

[YannBuntu]

/media/win/ubuntu/disks/root.disk: No such file or directory

That means you haven't checked where your Wubi was.
Please indicate your Boot-Info URL ( https://help.ubuntu.com/community/Boot-Info )

[direwolf6]

Boot info report is here:
http://paste.ubuntu.com/1212958

Thanks

[YannBuntu]

ok. Your Wubi is on sda3, not sda1.
So please replace sda1 by sda3 in the procedure I gave you previously.

[direwolf6]

Hi Yann

I have repeated your steps using sda3 but that did not help. I now cannot even boot into windows. When I restart my computer I get the message bootmgr missing. When I boot using my windows installation disk there are no drivers present only the xdrive so I cannot even do a complete reinstall.

What do you suggest now as a way to fix everything? I just want to start again from scratch. I am worried I have just broken my new computer!

Update: Changing my SATA from 'Intel Response Technology' to 'AHCI' let the disk partitions show up. I am now reinstalling windows 7.