[Bug 1311247] Re: [Grubenv] error: malformed file, press any key to continue

[Bertram]

I faced the bug as well, however none of the reported workarounds worked
for me.

After a bit of testing I found out that the error doesn't appear when
booting a boot-entry from the grub-submenu "Advanced options for Ubuntu"
(see attachements), it only appears when selecting the default entry
"Ubuntu".

Since the first entry of the "Advanced"-submenu is the same as the
standard (i.e. the one using the latest kernel) entry, changing the
default boot entry from "0" to "1" in /etc/default/grub did the trick
for me. The error doesn't shop up any more.

/etc/default/grub
#GRUB_DEFAULT=0
GRUB_DEFAULT=1

Just for the sake of completeness: Moving that entry out of the submenu
(by altering /etc/grub/grub.cfg manually) makes the bug reappear. The
entry has to be within the submenu.

** Attachment added: "GRUB menu (including submenu "Advanced options for Ubuntu")"
   https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1311247/+attachment/4165759/+files/grub_menu.png

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https://bugs.launchpad.net/bugs/1311247

Title:
  [Grubenv] error: malformed file, press any key to continue

Status in GRand Unified Bootloader:
  Unknown
Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  I have just upgraded from 12.04 to 14.04

  Since the upgrade, when I boot up, the process stops and the normal
  grub screen is replaced after a short while by a message saying

  "error: malformed file, press any key to continue"

  Pressing a key allows booting to continue.

  Someone else who experienced this found that the problem went away
  after having re-installed grub.  I tried this but this did not resolve
  the problem for me.

  synaptic reports the grub package as 2.02~beta2-9

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