Windows won't boot anymore

[Spock112]

Binary package hint: grub2

Suddly grub fails to boot the Win7 entry.
If selected I get the Message "Reboot or select proper Bootdevice. Press any Key to continue".

the dualboot configuration worked fine for a long time and a lot of ubuntu updates.

BTW Win7 is on sda4 and ubuntu on the same disk in an extended partion sda6 (ubuntu works just fine)

So I restored Win MBR ... Windows boots fine ... I boot a live linux, chroot in the ubutu root install grub2 again ... grub is their, ubutu works ... win7 doesn't work again.

any suggestions?

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: grub-pc 1.98+20100804-5ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-25.43-generic 2.6.35.10
Uname: Linux 2.6.35-25-generic i686
Architecture: i386
Date: Tue Jan 18 17:24:42 2011
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.utf8
 SHELL=/bin/bash
SourcePackage: grub2

[Spock112 (spock112)]

Hi again,
there seems to be no update in grub between working win7 boot and nonworking ...

I attached my grub.cfg and fdisk output. If you need any more, please let me know.

I repaired the Win mbr once more, and then repaired everything bootrec.exe can repair -> Windows boots ... after installing grub again to sda ... Win no loger boots ...

[Spock112 (spock112)]

so this is strange ...
SuperGrubDisk will boot my Windows fine with
"set root=hd0,4
chainloader +1"

my own grub won't boot windows with the same options ...

[Spock112 (spock112)]

For all with this situation, there is a workaround:

Boot your ubuntu and install grub to the linux partion
"grub-install /dev/sda6 --force" in my case (you need --force, because grub will tell you, that install grub to a partion is not the nice way.

Boot your windows
- with supergrubdisk
- or by Windows Disc in repair mode and bootrec.exe

install a tool "EasyBCD"
- now you can add the linux partion with grub in it to the menu (chage the default one, time, etc.)
- if you used Supergrubdisk you have to install the windows bootloader to the MBR. EasyBCD can do this (WinXP bootloader/Win7 bootloader) - Win7 Bootloader in my case

what will this do ...
the 1. bootloader will be the Win one. In my case, it will boot by default linux. Win bootloader will load grub ... and than ubuntu.

BTW: after this ... and a update-grub ... win7 sillt won't boot out of grub
BTW2: I used Supergrub2disk 1.98s1

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for grub2 (Ubuntu) because there has been no activity for 60 days.]