<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Date: Mon, 5 Nov 2012 14:20:22 -0500<br>
From: R KANNAN <<a href="mailto:rk111810@gmail.com" target="_blank">rk111810@gmail.com</a>><br>
To: <a href="mailto:mythtv-users@mythtv.org" target="_blank">mythtv-users@mythtv.org</a><br>
Subject: Re: [mythtv-users] Mythbuntu CD would not boot on a X64<br>
Message-ID:<br>
<<a href="mailto:CABX2cSFQNAgVL-c3STwz%2BifoqBpf50N6G-pXsPVjPhyhpQt87A@mail.gmail.com" target="_blank">CABX2cSFQNAgVL-c3STwz+ifoqBpf50N6G-pXsPVjPhyhpQt87A@mail.gmail.com</a>><br>
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<br>
> Date: Mon, 05 Nov 2012 11:41:36 -0500<br>
> From: "R. G. Newbury" <<a href="mailto:newbury@mandamus.org" target="_blank">newbury@mandamus.org</a>><br>
> To: Discussion about MythTV <<a href="mailto:mythtv-users@mythtv.org" target="_blank">mythtv-users@mythtv.org</a>><br>
> Subject: Re: [mythtv-users] Mythbuntu CD would not boot on a X64<br>
> Message-ID: <<a href="mailto:5097EC40.4080503@mandamus.org" target="_blank">5097EC40.4080503@mandamus.org</a>><br>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>
><br>
> On 11/04/2012 10:52 PM, R KANNAN wrote:<br>
><br>
> ><br>
> ><br>
> > I apologize for top posting (gmail is partly to blame) and also not<br>
> > using the correct subject line.<br>
> ><br>
> > Any ideas on why the MBR does not get updated with the Mythbuntu install<br>
> > on HP?<br>
><br>
> With recent Fedora versions, the installer recognizes that the disk is<br>
> *already* partitioned with an MBR and does NOT overwrite it with a GPT<br>
> scheme. If the disk is blank, then it is GPT partitioned.<br>
><br>
> I would not be surprised if *buntu's installer does the same thing as it<br>
> is logical that it should 'do no harm'.<br>
><br>
> In which case, I think your response should be to use a livecd/liveusb<br>
> such as SysRescue or Rescue is Possible (and you *do* have one of those<br>
> handy, right?) and wipe the disk clean. SysRescue includes gparted which<br>
> makes things very easy. Either wipe everything, or set up your preferred<br>
> partition layout (MBR or GPT as you wish).<br>
><br>
> Geoff<br>
><br>
No. My problem is the reverse of what you are describing here. I have a<br>
hard disk with MBR partition layout with two Windows 7 partitions with<br>
data already. When I add Ubuntu (mythbuntu 12.04), creating more partitions<br>
for '/', '/home' etc, it goes through fine but DOES NOT UPDATE the MBR. So<br>
I can only boot to Windows 7.<br>
<br>
I was wondering why the installer thinks it is a GPT partition scheme which<br>
explains why the MBR is not updated. There does not seem to be anyway to<br>
control the boot loader in the installation other than where it goes to<br>
'(/dev/sda' in my case).<br>
<br>
In the HP bios there seems to be a boot option to select 'Legacy Boot<br>
Devices->ATAPI DVD/CD-ROM' in addition to 'UEFI Boot Devices-> ATAPI<br>
DVD/CD_ROM' , Perhaps I can choose that but unfortunately that does not<br>
allow me to choosing kernel options ('nomodeset' needed for my graphics<br>
card) while botting from the install CD.<br>
<br></blockquote><div>I finally figured out what was happening. Ubuntu install CD can boot up<br>
either as a UEFI or legacy (MBR) boot source. HP BIOS was booting it as a<br>
UEFI device. When it is started in this fashion, Ubuntu installer seems<br>
to be confused because the /dev/sda is partitioned as MBR. So in order to<br>
'do no harm' maybe it does not overwrite MBR making the machine boot only<br>
in Windows 7. But the BIOS has an option has an option to boot the CD as a<br>
legacy boot source. When I did that and installed, it overwrote the MBR on<br>
the hard disk and I am in business.<br>
<br>
For the benefit of others, make sure the Windows recovery partition is<br>
deleted, otherwise MBR will be overwritten by 'HP recovery manager'. <br></div></div>