Re: multiboot fails -- debian + ubuntu
On Wed, Sep 21, 2011 at 1:40 PM, Russell L. Harris <rlharris.@oplink.net> wrote:
> * Tom H <tomh0665@gmail.com> [110921 02:09]:
>> Given the grub version, it's your Wheezy install that's controlling
>> boot.
>
> Thank you for noticing this. My intent was to have stable (Squeeze)
> controlling boot, because of the vagaries of testing. But this
> (Wheezy) may be better.
Unless you're using partitioned mdraid, I'm not sure what benefit
there might be from favoring Wheezy's grub over Squeeze's - but using
Wheezy's shouldn't be a problem.
>> Why did you run "grub-install"? Since you chose not to install a
>> bootloader, all you needed to do was run "update-grub" in Wheezy.
>>
>> Did you just run "grub-install"? Or "grub-install /dev/sda"? (I
>> wouldn't have thought that "grub-install" would work.
>
> Forgive me. It was "update-grub" and not "grub-install" which I ran
> in Squeeze. The update process found Ubuntu, so I did not look
> further.
No worries.
>> Do
>> grub-probe --target=fs_uuid --device /dev/sda7
>> and
>> blkid -c /dev/null /dev/sda7
>> return the same value and does it correspond to the UUID in the
>> "search" and "linux" lines of the Ubuntu entry in grub.cfg?
>
> For the record, here is the output from Wheezy:
>
> # update-grub
> Generating grub.cfg ...
> Found background image: /usr/share/images/desktop-base/desktop-grub.png
> Found linux image? /boot/vmlinuz-3.0.0-1-486
> Found initrd image: /boot/initrd.img-3.0.0-1-486
> Found Debian GNU/Linux (6.0.2) on /dev/sda5
> Found Ubuntu 10.04.3 LTS (10.04) on /dev/sda7
> done
>
> # blkid -c /dev/null
> /dev/sda1: UUID=" <snip> " SEC_TYPE="ext2" TYPE="ext3"
> /dev/sda3: UUID=" <snip> " TYPE="swap"
> /dev/sda4: UUID=" <snip> " TYPE="ext3"
> /dev/sda5: UUID=" <snip> " SEC_TYPE="ext2" TYPE="ext3"
> /dev/sda6: UUID=" <snip> " TYPE="ext4"
> /dev/sda7: UUID=" <snip> " SEC_TYPE="ext2" TYPE="ext3"
>
> # grub-probe --target=fs_uuid --device /dev/sda7
> <snip>
>
> I did not type the actual UUIDs, because I am transcribing on another
> machine (not cutting and pasting). The UUID which blkid returns for
> /dev/sda7 does match the UUID returned by grub-probe.
>
> The Ubuntu entries in /boot/grub.cfg refer to /dev/sda7 rather than to
> the UUID.
>
> Now I would like to know why the grub boot menu has five entries for
> Ubuntu, and how to get rid of three or four of them...
I can't think of any way other than editing "/etc/grub.d/30_os-prober"
not to detect more than x kernels on each "/boot".
I once googled to a grub-devel post in which someone requested from
the grub developers that they re-instate grub1's "howmany" variable
but they weren't interested (IIRC, I'm not sure that they really
understood what was being requested).
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