after upgrading from W7 to W10, grub2 still thinks it's W7

[Andre Robatino]

I have a BIOS machine which is dual boot Windows 7/Fedora 22. I just
upgraded Windows from 7 to 10, but grub2 still detects it as "Windows 7
(loader)", same as before, even after running "grub2-install /dev/sda" and
"grub2-mkconfig -o /boot/grub2/grub.cfg" in F22. Other than the mislabel,
everything seems fine. Is it normal for grub2 to not detect the correct
Windows version? What about Windows 8, which has been around for a while?

[Chris Murphy]

On Sun, Aug 2, 2015 at 9:53 PM, Andre Robatino
<robatino(a)fedoraproject.org&gt; wrote:
>  I have a BIOS machine which is dual boot Windows 7/Fedora 22. I just
>  upgraded Windows from 7 to 10, but grub2 still detects it as "Windows 7
>  (loader)", same as before, even after running "grub2-install /dev/sda"
> and
>  "grub2-mkconfig -o /boot/grub2/grub.cfg" in F22. Other than the mislabel,
>  everything seems fine. Is it normal for grub2 to not detect the correct
>  Windows version? What about Windows 8, which has been around for a while? 
I'm pretty sure this is hard coded in GRUB. There is nothing that GRUB
finds that identifies the version. Perhaps the most appropriate thing
is to get a patch that just says "Microsoft Windows" to upstream.


-- 
Chris Murphy

[Andre Robatino]

Chris Murphy <lists <at> colorremedies.com> writes:

>  On Sun, Aug 2, 2015 at 9:53 PM, Andre Robatino
>  <robatino <at> fedoraproject.org> wrote:
>  > I have a BIOS machine which is dual boot Windows 7/Fedora 22. I just
>  > upgraded Windows from 7 to 10, but grub2 still detects it as "Windows 7
>  > (loader)", same as before, even after running "grub2-install
> /dev/sda" and
>  > "grub2-mkconfig -o /boot/grub2/grub.cfg" in F22. Other than the mislabel,
>  > everything seems fine. Is it normal for grub2 to not detect the correct
>  > Windows version? What about Windows 8, which has been around for a while?
>  
>  I'm pretty sure this is hard coded in GRUB. There is nothing that GRUB
>  finds that identifies the version. Perhaps the most appropriate thing
>  is to get a patch that just says "Microsoft Windows" to upstream. 
I have two other BIOS machines that are also dual-boot Windows and F22 (one
is XP and the other is Vista) and grub2 detects them correctly as "Microsoft
Windows XP Home Edition" and "Windows Vista (loader)", resp. I don't
know if
something changed in Windows 8 and later, or if it has to do with my W10
machine being an upgrade from W7, as opposed to the clean install I normally
do. (I could clean install it, since W10 should reactivate automatically,
but it's not worth the trouble for now.)

[Steven Usdansky]

Interesting. After upgrading from W7 to W8.1, I had  'Windows 8
(loader) (on /dev/sda1)'. However, After installing W10 Tech Preview
10130 and upgrading to the actual release, I have 'Windows 7 (loader)
(on /dev/sda1)'

On Mon, Aug 3, 2015 at 12:12 AM, Andre Robatino
<robatino(a)fedoraproject.org&gt; wrote:
>  Chris Murphy <lists <at> colorremedies.com> writes:
>
> > On Sun, Aug 2, 2015 at 9:53 PM, Andre Robatino
> > <robatino <at> fedoraproject.org> wrote:
> > > I have a BIOS machine which is dual boot Windows 7/Fedora 22. I just
> > > upgraded Windows from 7 to 10, but grub2 still detects it as "Windows 7
> > > (loader)", same as before, even after running "grub2-install
> /dev/sda" and
> > > "grub2-mkconfig -o /boot/grub2/grub.cfg" in F22. Other than the
> mislabel,
> > > everything seems fine. Is it normal for grub2 to not detect the correct
> > > Windows version? What about Windows 8, which has been around for a while?
> >
> > I'm pretty sure this is hard coded in GRUB. There is nothing that GRUB
> > finds that identifies the version. Perhaps the most appropriate thing
> > is to get a patch that just says "Microsoft Windows" to upstream.
>
>  I have two other BIOS machines that are also dual-boot Windows and F22 (one
>  is XP and the other is Vista) and grub2 detects them correctly as "Microsoft
>  Windows XP Home Edition" and "Windows Vista (loader)", resp. I don't
> know if
>  something changed in Windows 8 and later, or if it has to do with my W10
>  machine being an upgrade from W7, as opposed to the clean install I normally
>  do. (I could clean install it, since W10 should reactivate automatically,
>  but it's not worth the trouble for now.)
>
>
>
>
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[Chris Murphy]

http://git.savannah.gnu.org/cgit/grub.git/tree/util/grub.d/10_windows.in

This looks like BIOS bootloader recognition with two distinctions:
Windows NT/2000/XP (loader)
Windows Vista/7 (loader)

http://git.savannah.gnu.org/cgit/grub.git/tree/util/grub.d/30_os-prober.in

This might be the one for EFI, but I can't tell how it distinguishes
between them.

Windows\ Vista*|Windows\ 7*|Windows\ Server\ 2008*)



-- 
Chris Murphy