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Can't boot from Live CD to fix Grub problem

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http://askubuntu.com – I have a dual boot of Win7 and Ubuntu on my HP laptop. I upgraded from Ubuntu 11.10 to 12.04 today and on restart I got a different black Grub screen instead of the usual purple one. (GNU GRUB version 1.99-21ubuntu3.1) Each boot option only returns error messages. error: no such partition. I read on some other posts that I should make a live CD and boot there to use the boot repair tool but my laptop wont boot from the disk. I have changed the BIOS setting so that boot from disk is first and also tried telling it to boot from CD in the Startup Menu. Each time I restart however the CD d (HowTos)

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Submitted by Danial on 07/14/2012 – Made popular on 07/14/2012

Stories similar to Can't boot from Live CD to fix Grub problem

I have a laptop on which I had Win 7 and Ubuntu 12.04 installed. The hdd has two partitions (one primary and one extended). Grub wasn't loaing initially so I ran the boot disk repair tool which seemed to sort it out. However, I mistakenly removed python (long story) from the Ubuntu OS and this obviously messed up Ubuntu a lot.

My machine has 2 separate physical disks, one for each OS. Windows (sda) and Ubuntu Linux (sdb). My Windows disk had "Vista Business x64" and the linux disk has Ubuntu 12.04. I recently upgraded Vista to "Win 7 Pro x64" and as expected, it screwed with the MBR and GRUB was not coming up at boot up time.

Ok, so I'm having this problem. I have also seen something called Boot Repair

Any help?

I tried installing Ubuntu 12.04 from the live CD. The install went fine but i had the next error while booting :

Grub stage 1.5 error 2.

So I used boot-repair as explained here. Still not working, i got this while booting :

GNU GRUB version 1.99-21ubuntu3

Minimal bash-like line editing is supported.

etc.. Nothing more.

Here the report from boot-repair.

Could anyone help me ?

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[ubuntu] Grub Rescue Error 16 weeks 2 days ago

Hi All,

Ubuntu 12.04 will not boot on my laptop. I keep getting the following error.

error: unknown filesystem. grub rescue>

I am able to run a live-cd. I have tried using boot-repair-disk.iso; however, it says something to the effect of the boot repair was successful and to restart the computer... I restart the computer, and I get the same error.

Please advise.

-drew

I've got an Acer Aspire 5750-6866 with 8gb of user upgraded memory. been running dual boot ubuntu and windows 7 for a while. the other day i start getting the hd0 out of disk error and a boot screen that is completely different than what i was getting before (purple boot screen).

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I am fairly new to Linux/Ubuntu and am in need of some help. I have dual booted Windows 7 and Ubuntu 12.10 on 2 separate hard drives. After several attempts, I was only able to get it working by changing the BIOS hd boot option. I then found some threads on repairing the boot process by using Boot-Repair.