[Bug 1462687] [NEW] update-grub creates duplicate ubuntu entries

[Vasya Pupkin]

Public bug reported:

On my laptop update-grub creates duplicate Ubuntu entries. First created
by update-grub itself, second added by os-prober. It doesn't happen on
other laptops, only on my ASUS Zenbook UX301LAA. Here's os-prober
output:

$ sudo os-prober 
/dev/mapper/isw_dahhdhgec_ASUS_OS1@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi
/dev/mapper/isw_dahhdhgec_ASUS_OS7:Ubuntu 15.04 (15.04):Ubuntu:linux

On my other (older) laptop os-prober only outputs Windows entry.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: grub (not installed)
ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
Uname: Linux 3.19.0-18-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Jun  7 00:48:40 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-05-06 (31 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: grub
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1462687

Title:
  update-grub creates duplicate ubuntu entries

Status in grub package in Ubuntu:
  New

Bug description:
  On my laptop update-grub creates duplicate Ubuntu entries. First
  created by update-grub itself, second added by os-prober. It doesn't
  happen on other laptops, only on my ASUS Zenbook UX301LAA. Here's os-
  prober output:

  $ sudo os-prober 
  /dev/mapper/isw_dahhdhgec_ASUS_OS1@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi
  /dev/mapper/isw_dahhdhgec_ASUS_OS7:Ubuntu 15.04 (15.04):Ubuntu:linux

  On my other (older) laptop os-prober only outputs Windows entry.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: grub (not installed)
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jun  7 00:48:40 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-05-06 (31 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  SourcePackage: grub
  UpgradeStatus: No upgrade log present (probably fresh install)

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