Re: Debian's grub doesn't detect Ubuntu
On Thu, 2012-06-28 at 13:51 +0300, Mika Suomalainen wrote:
> On 27.06.2012 18:35, Helgi Örn Helgason wrote:
> > On 27 June 2012 07:37, Mika Suomalainen <mika.henrik.mainio@hotmail.com> wrote:
> >> > Hi,
> >> >
> >> > I have three OSes on this computer. They are Debian Sid, Ubuntu Precise
> >> > and Windows 7.
> >> >
> >> > It seems that Debian's grub can only detect Debian and Windows 7, but
> >> > not Ubuntu.
> >> >
> >> > I have tried Googling and running update-grub some times, but I haven't
> >> > found anything useful.
> >> >
> >> > What should I try now?
> >> >
> > Did you mount the Ubuntu partition before running update-grub?
> > If not, then try that. Usually that will help.
>
> Thank you for your reply.
>
> I tried mounting all partitions now and running update-grub after
> reading your email, but it didn't seem to work. I am still seeing only
> Debian and Windows 7 in GRUB.
>
Try running update-grub on the Ubuntu partition. If these are on
partitions on a single disk then make sure that you don't writ this
Ubuntu results to the MBR. You just need to regenerate grub.cfg for
Ubuntu. Then do the same for Debian but tell grub to write to the MBR.
If these are on separate disks then have the ubuntu update write to the
boot partition on the disk that it is installed on. Then have debian
write to the MBR. I expect that the MBR is on a Windows 7 disk that is
mounted as your start up disk as Win7 does not play well elsewise. If
possible & you have these on separate disks then change the boot
sequrence in you system bios to have your Debian disk as the first boot
disk. I have such a setup. Debian, Ubuntu, Linux Mint, Windows 7 pro in
that order, Each on its own disk.
frosty
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