Bug#679817: Broken chainloader entry for windows 7 in grub.cfg

[Eddy F.]

Dear maintainer,

I would like to tell you that I experienced precisely the same bug
when installing Wheezy x64 using uefi on a machine where windows 7 was
already installed.

My work around was to disable os-prober in grub by adding the line

	GRUB_DISABLE_OS_PROBER=true

at the end of /etc/default/grub then I created a custom entry for
windows 7 by adding

	menuentry "Windows 7" --class windows --class os {
        set root='(hd0,gpt3)'
        chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
        }
	
to /etc/grub.d/40_custom and then updating grub by 
	update-grub.

Sorry I can't send system information right now because the machine is
not mine and I haven't access to it at the moment.

Hope this helps,

Thanks for your work.

-- 
Eddy F.