Bug 815301

Description of problem:

When I try to install either Fedora 17 Beta or RFRemix 17 Beta GRUB doesn't install to the root partition. 

XFCE spin for both editions, x86_64


How reproducible:
Choose installing bootloader to new fedora root partition (http://en.zimagez.com/zimage/-23042012-154455.php)
RFRemix installer said there was a problem in bootloader installation, whereas Fedora's one makes no notice.
  
Actual results:
After chainloading I see GRUB error
'invalid signature' with RFRemix installed and just a string 'GRUB' with original Fedora installed. In the latter case there is blinking cursor that doesn't respond to keyboard

Expected results:
GRUB from MBR should link to Fedora's GRUB via chainloading.

Additional info:
I tried to use chroot to fix that under live-usb Fedora and gentoo-based distro

results for Fedora:

# mount /dev/sda7 /mnt/rfr
# mount -t proc none /mnt/rfr/proc
# mount -o bind /dev /mnt/rfr/dev
# mount -o bind /sys /mnt/rfr/sys
# grub2-install /dev/sda7
/sbin/grub2-bios-setup: warning: File system `ext2' doesn't support embedding.
/sbin/grub2-bios-setup: warning: Embedding is not possible.  GRUB can only be
installed in this setup by using blocklists.  However, blocklists are UNRELIABLE
and their use is discouraged..
/sbin/grub2-bios-setup: error: will not proceed with blocklists.
# grub2-install /dev/sda7 --force
/sbin/grub2-bios-setup: warning: File system `ext2' doesn't support embedding.
/sbin/grub2-bios-setup: warning: Embedding is not possible.  GRUB can only be
installed in this setup by using blocklists.  However, blocklists are UNRELIABLE
and their use is discouraged..
Installation finished. No error reported.
# grub2-install  --boot-directory=/boot --force '(hd0,7)'
/sbin/grub2-bios-setup: warning: File system `ext2' doesn't support embedding.
/sbin/grub2-bios-setup: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
Installation finished. No error reported.

==================================
I have the following partition:

/dev/sda1 and /dev/sda2 are for Windows.
/dev/sda3 is not used
/dev/sda4 is extended partition
/dev/sda5 Ubuntu
/dev/sda6 Calculate Linux 
/dev/sda7 <-- Fedora is installed here
/dev/sda8 is /home partition

There is Calculate's GRUB2 bootloader in MBR. Chainloading works well for linking to Ubuntu, the Ubuntu's GRUB is stored in its own partition and it works fine. I try to do the same thing with Fedora installation but the problem occurs.

# fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, всего 1953525168 секторов
Units = секторы of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xe3b23936

Устр-во Загр     Начало       Конец       Блоки   Id  Система
/dev/sda1            2048      206847      102400    7  HPFS/NTFS/exFAT
/dev/sda2          206848   163839999    81816576    7  HPFS/NTFS/exFAT
/dev/sda3       163840000   164966399      563200   83  Linux
/dev/sda4       164966400  1953525167   894279384    5  Расширенный
/dev/sda5       164968448   205928447    20480000   83  Linux
/dev/sda6       205930496   246890495    20480000   83  Linux
/dev/sda7   *   246892544   287852543    20480000   83  Linux
/dev/sda8       287854592  1953523711   832834560   83  Linux