[Bug 1387654] Re: installing or upgrading to Ubuntu 14.10 kills Boot Manager on ThinkPad W540

[Andrew Pope]

Thanks @addam-edgley et al! I was thrashing on this for most of last
night but figured it out in the morning.

I had a slightly different experience (mainly encrypted root with LVM),
so recording it in full for The People Of The Future™. This is very
similar to Adam's post and the answer at
http://superuser.com/questions/376470/how-to-reinstall-grub2-efi

- Boot live CD and open terminal.
- Connect to wifi and ensure that your resolv.conf has a good nameserver (e.g. you can `dig google.com`).
- $ sudo su -
- Use gdisk (or fdisk) to check which disk is your HDD. Mine was /dev/sda
- # cryptsetup open /dev/sda3 myroot    ## You will need the passphrase for this.
- # lvdisplay    ## Find the path of your root volume. Mine was /dev/ubuntu-vg/root
- # mount /dev/ubuntu-vg/root /mnt
- # mount /dev/sda2 /mnt/boot    ## Required for doing update-grub later.
- # mkdir /mnt/boot/efi ; mount /dev/sda1 /mnt/boot/efi
- # for i in /dev /dev/pts /proc /sys; do sudo mount -B $i /mnt$i; done
- # cp /etc/resolv.conf /mnt/etc/    ## Makes the network available after chrooting.
- # modprobe efivars
- #chroot /mnt
- Add "deb http://au.archive.ubuntu.com/ubuntu/ trusty main restricted" to /etc/apt/sources.list
- # apt-get update
- # apt-get install efibootmgr=0.5.4-7ubuntu1
- # update-grub
- # ls /boot/efi/EFI/ubuntu    ## Find the efi files that you might need. Mine was shimx64.efi & grubx64.efi
- # efibootmgr -c --disk /dev/sda --part 1 --loader '\EFI\ubuntu\shimx64.efi' --label 'Linux shim'    ## Where ' --part 1' is your EFI partition number on '--disk /dev/sda'.
- # efibootmgr -c --disk /dev/sda --part 1 --loader '\EFI\ubuntu\grubx64.efi' --label 'Linux grub'
- # efibootmgr -v    ## Verify the new records.
- Ctrl+D to leave the chroot.
- # umount /dev/sda1    # dismount EFI volume
- # umount /dev/sda2    # dismount boot volume
- # reboot

Thanks again everyone - you saved my weekend.

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https://bugs.launchpad.net/bugs/1387654

Title:
  installing or upgrading to Ubuntu 14.10 kills Boot Manager on ThinkPad
  W540

Status in efibootmgr package in Ubuntu:
  Confirmed
Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  When you install or upgrade to Ubuntu 14.10 on a Lenovo ThinkPad W540
  after a reboot the machine prints:

  
  Boot Manager recover from critical error. Some essential variables are absent or corrupted and Boot Manager has restored them from default configuration. Press Esc to continue or F1 to enter Setup.

  Then restores to default configuration (eg only Windows boots)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: ubuntu-release-upgrader-core 1:14.10.9
  ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
  Uname: Linux 3.16.0-23-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Oct 30 13:10:43 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-10-27 (3 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to utopic on 2014-10-28 (2 days ago)
  VarLogDistupgradeTermlog:

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