[Bug 1441039] [NEW] os-prober fails with chainloader on win7 partition

[Jürgen]

Public bug reported:

os-prober detects win7 partition and creates menuentry with chainloader+1 (see http://paste.ubuntu.com/10696096/),
 but loading win7 ends in black screen without returning to GRUB2 menu.
modified separate menuentry "11_Win7-Loader" (see below) in /etc/grub.d/ using ntldr instead works pretty well, 
after disabling OS_Prober in /etc/default/grub: GRUB_DISABLE_OS_PROBER="true"

menuentry "Windows7 (loader) on sda2" --class windows --class os {
	savedefault
	insmod part_msdos
	insmod ntfs
	insmod ntldr
	set root='(hd0,msdos2)'
	search --no-floppy --fs-uuid --set=root DEF2805CF2803B33
	ntldr /bootmgr
}

** Affects: os-prober (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1441039

Title:
  os-prober fails with chainloader on win7 partition

Status in os-prober package in Ubuntu:
  New

Bug description:
  os-prober detects win7 partition and creates menuentry with chainloader+1 (see http://paste.ubuntu.com/10696096/),
   but loading win7 ends in black screen without returning to GRUB2 menu.
  modified separate menuentry "11_Win7-Loader" (see below) in /etc/grub.d/ using ntldr instead works pretty well, 
  after disabling OS_Prober in /etc/default/grub: GRUB_DISABLE_OS_PROBER="true"

  menuentry "Windows7 (loader) on sda2" --class windows --class os {
  	savedefault
  	insmod part_msdos
  	insmod ntfs
  	insmod ntldr
  	set root='(hd0,msdos2)'
  	search --no-floppy --fs-uuid --set=root DEF2805CF2803B33
  	ntldr /bootmgr
  }

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