[Bug 1462687] Re: update-grub creates duplicate ubuntu entries

[Vasya Pupkin]

I found why it happens. The problem is how os-prober resolves UUID-
mounted partitions. It uses `readlink -f`. And it works in most cases,
but on my system it works like that:

$ readlink -f /dev/disk/by-uuid/b7c815db-eefe-4e08-8d62-0c68531fa8ca
/dev/dm-7

So UUID resolved to /dev/dm-7 instead of isw_dahhdhgec_ASUS_OS7, so os-
prober didn't test if this partition is actually mounted as '/'.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub in Ubuntu.
https://bugs.launchpad.net/bugs/1462687

Title:
  update-grub creates duplicate ubuntu entries

Status in grub package in Ubuntu:
  New
Status in os-prober 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)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub/+bug/1462687/+subscriptions