[Bug 1639516] Re: grub no longer detects the internal storage device as bootable

[Alberto Salvia Novella]

The problem reappeared for a third time, but in this occasion I solved
it simply by a hard reset.

Curiously a second computer in my home also exhibited screen flickering
that was solved by this method. There should be a solar storm or
something.

** Changed in: grub2 (Ubuntu)
       Status: Triaged => Invalid

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Title:
  grub no longer detects the internal storage device as bootable

Status in grub2 package in Ubuntu:
  Invalid

Bug description:
  I just switched my computer on, and grub shown this error:

  error: attempt to read or write outside of disk 'hd0'.
  Entering rescue mode

  From that point my computer was no longer usable, and I did nothing
  for that to happen.

  Further investigation shown that the "/boot/grub/linux.mod" file was
  no longer there. I managed to repair the error by using a live CD and
  (https://help.ubuntu.com/community/Boot-Repair).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-generic 4.4.0.45.48
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  es20490446e   1912 F.... pulseaudio
   /dev/snd/controlC0:  es20490446e   1912 F.... pulseaudio
   /dev/snd/controlC1:  es20490446e   1912 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Nov  5 23:33:02 2016
  HibernationDevice: RESUME=UUID=17310d8b-5b23-4c94-9790-450131aebade
  InstallationDate: Installed on 2016-05-02 (187 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  IwConfig:
   lo        no wireless extensions.

   enp0s25   no wireless extensions.
  MachineType: MEDIONPC MS-7358
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-45-generic root=UUID=c34225d3-c644-4d92-a8ea-00123e6255e1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-45-generic N/A
   linux-backports-modules-4.4.0-45-generic  N/A
   linux-firmware                            1.157.4
  RfKill:

  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/18/2008
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: 6.00 PG
  dmi.board.name: MS-7358
  dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  dmi.board.version: Fab D
  dmi.chassis.type: 3
  dmi.chassis.vendor: OEM
  dmi.chassis.version: OEM
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd02/18/2008:svnMEDIONPC:pnMS-7358:pvrOEM:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7358:rvrFabD:cvnOEM:ct3:cvrOEM:
  dmi.product.name: MS-7358
  dmi.product.version: OEM
  dmi.sys.vendor: MEDIONPC

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