[mdlug] {SOLVED] Mythbuntu CD would not boot on a X64 system

[R KANNAN]

On Sun, Nov 4, 2012 at 4:13 PM, R KANNAN <rk111810 at gmail.com> wrote:

>
>
> On Sun, Nov 4, 2012 at 3:46 PM, Jeff Hanson <jhansonxi at gmail.com> wrote:
>
>> I'm working on a dual-boot GPT/non-EFI (BIOS) system but haven't had time
>> to complete it yet.  From what I've read GRUB2 requires a small partition
>> (1MB or less) for itself but this doesn't get created with the Ubuntu
>> installer.  In my situation the target system is using RAID 1 with both
>> and
>> Win7 requires Dynamic Volumes for RAID and these use GPT only.  I haven't
>> had time to finish the install yet so I don't know if this will work or
>> not.
>>
>>
>> Not sure if you read my later post yet. I thought it was the HP recovery
> manager that comes with this system. It apparently checks MBR for a change
> and 'restores' the old MBR (after Ubuntu). One of the solutions suggested
> was the small (12 GB) recovery partition that HP creates (after making some
> back up recovery DVDs) . I did that, installed ubuntu again but still no
> cigar :-)  BTW, I am using legacy (non EFI) boot using MBR.
>

I finally figured out what was happening. Ubuntu install CD can boot up
either as a UEFI or legacy (MBR) boot source. HP BIOS was booting it as a
UEFI device. When it  is started in this fashion,  Ubuntu installer seems
to be confused because the /dev/sda is partitioned as MBR. So in order to
'do no harm' maybe it does not overwrite MBR making the machine boot only
in Windows 7. But the BIOS has an option has an option to boot the CD as a
legacy boot source. When I did that and installed, it overwrote the MBR on
the hard disk and I am in business.

For the benefit of others, make sure the Windows recovery partition is
deleted, otherwise MBR will be overwritten by 'HP recovery manager'.