[Bug 1785506] Re: most recent update on cosmic leads to unable to mount

[Launchpad Bug Tracker]

[Expired for grub2 (Ubuntu) because there has been no activity for 60
days.]

** Changed in: grub2 (Ubuntu)
       Status: Incomplete => Expired

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Title:
  most recent update on cosmic leads to unable to mount

Status in grub2 package in Ubuntu:
  Expired

Bug description:
  1) new install, ubuntu 16.04, (single / partition (ext4?) + swap partition)
  2) upgrade to bionic/18.04
  3) upgrade to cosmic/18.10
  4) upgrade grub2 via aptitude to most recent version
  5) update asks if I wish to chain load, I select yes
  6) update asks if I wish to install maintainer's version of grub.lst or menu.lst or something.  I choose the maintainer's version

  result (timestamps omitted):

  upon boot

  Booting ubuntu cosmic cuttlefish (development branch) kernel 4.17.0-6-generic 
  Booting ubuntu cosmic cuttlefish (development branch) kernel 4.17.0-6-generic
  Booting ubuntu cosmic cuttlefish (development branch) kernel 4.17.0-6-generic
  in 0 seconds [0.328965] Kernel Panic - not synching: VFS: unable to mount root fs on unknown-block(0,0)
  CPU 2: PID: 1 Comm: swapper/0 not tainted 4.17.0-6-generic #7-Ubuntu
  Hardware name Red Hat KVM , BIOS 0.5.1 01/01/2007
  Call Trace
   dump_stack+0x63/0x83
   panic+0xe7/0x247
   mount_block_root+0x231/0x2d8
  ? do_early_param +0x95/0x95
  mount_root+0x38/0x3a
  prepare_namespace+0x139/0x18e
  kernel_init_freeable+0x236/0x261
  ?rest_init +0xb0/0xb0  
  kernel_init +0xe/0x10d
  ret_from_fork +0x35/0x40
  Kernel Offset : 0x8e00000 from 0xffffffff81000000 relocation range 0xffffffff80000000) 
  --- [ end kernel panic - not synching: VFS: Unable to mount root fs on unknown-block(0,0) ] ---

  server: vps, ext4 partitions(?),

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