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

[R KANNAN]

On Sat, Nov 3, 2012 at 7:59 PM, R KANNAN <rk111810 at gmail.com> wrote:

> It looks like the original disk was partitioned with MBR record. But for
> soie reason my Ubuntu installation thought it was GPT partition and so did
> not overwrite the MBR. Is there a way to force Mythbuntu 12.04 to write the
> MBR after the installation is complete. Do I need to run grub-update or
> something like that?
>

> On Sat, Nov 3, 2012 at 11:46 AM, R KANNAN <rk111810 at gmail.com> wrote:
>
>> Never mind. I could boot with the install CD after using kernel option
>> 'nomodeset'.
>>
>> I could create partitions as needed and install but the MBR did not get
>> updated. The system now boots up in Windows 7 (with reduced  disk space).
>> Maybe HP has a security option whereby it does not allow MBR to be updated.
>> Need to look into it.
>>
>> On Fri, Nov 2, 2012 at 11:29 PM, R KANNAN <rk111810 at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I have a new HP desktop with Intel  i7-2660 processor and windows 7.
>>>
>>> I downloaded an burned  a Mythbuntu 12.04 X64 iso. I also checked the
>>> md5sum on the downloaded iso and found it matched with the published value.
>>>
>>> When I tried boot the system up with the CD. It flashed the message
>>>
>>> Error: "Prefix is not set"
>>>
>>> but came with the following options menu
>>>
>>> Try Mythbuntu without installing
>>> Install Mythbuntu
>>> Check disk for defects
>>>
>>> When I tried either the first or second, the drive spins for a while,
>>> then it starts making sounds as if it is reading the disk and two
>>> horizontal lines of green/blue dots appears on the screen and the drive
>>> goes silent.
>>>
>>> I tried burning the image on another CD but with the same results.
>>> Should I be changing some options or use grub on the command line to debug?
>>>
>>> Thanks
>>
>>
>>
> It looks like the HP Recovery manager restores the MBR wiping the GRUB2
out after installation. As suggested by some of the websites, I even
removed the HP recovery partition after making backup disks. That did not
seem to help either. After a fresh install of Ubuntu 12.04, it keeps
booting into windows instead of bringing up the GRUB boor menu :-(

Any other ideas?