[Bug 1561842] Re: Grub bootloader disappears after a seemingly random amount of restarts/shutdowns.

[Tim]

Grub shouldnt just disappear!
Does running "update-grub" break it? (that would get triggered from time to time on system updates)
You dual boot with Windows? Is it possible that Windows is messing with the UEFI Boot Manager? Or does it happen when you reboot from Ubuntu?


I notice this diffing your before and after logs:
-		set root='hd1,gpt2'
+		set root='hd0,gpt2'
 		if [ x$feature_platform_search_hint = xy ]; then
-		  search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci1,gpt2  5290bec0-f256-4adf-804a-c44597538b95
+		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  5290bec0-f256-4adf-804a-c44597538b95

I don't know why those would change, perhaps grub got confused and used
sdb to configure instead of your ubuntu partition (sda)

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https://bugs.launchpad.net/bugs/1561842

Title:
  Grub bootloader disappears after a seemingly random amount of
  restarts/shutdowns.

Status in grub package in Ubuntu:
  New

Bug description:
  This happens on Ubuntu-Gnome 14.04.X(X being initial release and all
  point released after) through 15.10.  The OS itself is fine and can be
  booted into again by reinstalling Grub but will eventually happen
  again.

  This bug can happen right after a new install of Ubuntu-Gnome or many
  months after. When it does happen, the system works and acts the same
  as before and after the bug.

  Boot-repair logs:

  Before:  http://paste.ubuntu.com/15493004/

  After:  http://paste.ubuntu.com/15493018/


  Distro: Ubuntu-Gnome
  Version:  15.10
  Grub version: 2.02~beta2-29ubuntu0.3

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: grub (not installed)
  Uname: Linux 4.5.0-040500-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Thu Mar 24 23:15:47 2016
  InstallationDate: Installed on 2015-09-14 (193 days ago)
  InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150826.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub
  UpgradeStatus: No upgrade log present (probably fresh install)

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