[Bug 779213] Re: Dual boot fails with Mageia/Mandriva

[Zen25000]

Martino wrote 2 hours ago:      #1

Also my Ubuntu 11.04 fully upgraded can't boot Mageia 1. Kernel panic
here, too.

Look at /boot/grub/grub.cfg in Ubuntu and compare the (hdx.y) in the linux.... line with the one on the initrd..... line.
They should be the same - if they are not, edit the initrd line to use the same (hdx,y) as the linux line.
You will need to use an editor as root. This should fix it temporarily.
To work around this issue more permanently it would be better to move the Mageia entry from grub.cfg to /etc/grub.d/40_custom so that it will not be broken again when you run update-grub.
After moving it to 40_custom you will need to run update-grub for it to appear in the menu.
Hope that helps

This bug http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=566102
in OS-prober really needs fixing in Ubuntu :(

** Bug watch added: Debian Bug tracker #566102
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=566102

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https://bugs.launchpad.net/bugs/779213

Title:
  Dual boot fails with Mageia/Mandriva

Status in “grub2” package in Ubuntu:
  New

Bug description:
  While Kubuntu 11.04 is now my main distribution, I have also been
  testing the beta versions of Mageia. In attempting to run Mageia as a
  subsidiary distribution in a multi-boot situation controlled by
  Ubuntu/Kubuntu, I have run into a problem that I had previously
  experienced while attempting to use Mandriva in a similar way - the
  boot process terminates in a kernel panic, apparently because Grub2
  doesn't properly identify the default boot location in
  Mageia/Mandriva.

  The problem doesn't seem to arise (for me, anyway) with other
  distributions still using Grub1, such as openSUSE and Fedora, and has
  apparently already been raised upstream. See:

  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606904

  This bug was marked as resolved in version 1.98 of Grub2 back in
  August 2010. Nevertheless, the issue still exists in version
  1.99~rc1-13ubuntu, as used in Ubuntu and Kubuntu 11.04. Since this
  appears to be a version specific to Ubuntu. I have reported the bug
  here rather than re-opening the upstream bug at this stage.

  I have just discovered that another bug report, complete with what
  appears to be a very simple patch to fix the problem, was lodged
  upstream in January 2010:

  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=566102

  Clearly that patch has not yet been implemented.