Comment 271 for bug 1289977

On 11/01/2014 06:20 AM, Teo wrote:
> Which confirms there's a bug somewhere.

No, it does not. Installing grub to the wrong place because you
manually chose it is not a bug. Installing grub to /dev/sda by
default when your computer actually boots from another drive is also
not a bug, because unfortunately, there simply is no way to detect
which drive the computer boots from due to the limitations of the pc
bios. If grub outright failed to install, then there *may* be a bug.
 The installer automatically files a bug report when this happens so
it can be investigated.

Did you have a look at this other bug https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1311247 ?
There has to be something wrong in Ubuntu 14.04 concerning grub,because in some fresh installations,after everything has finished normally and the OS has been apparently installed without errors,then the system simply won't boot at all,period.
The workaround has been installing grub to a dedicated boot partition,something I wouldn't call a normal installation procedure:I've never had to do that with any other Linux system so far,including previous Ubuntu releases.