[Bug 1396583] [NEW] when update grub-pc using update-manager, system can not login

[shijing]

Public bug reported:

Description:
I had installed multi-operating system, mint, Ubuntu Kylin 14.04, Ubuntu Kylin 14.10, leading by UK14.04 by default.
I run update-manager in UK14.04, when it run update grub-pc, update-manager crashed, I had to restart the system, UK14.04 could not login,detail in attachment. the others two system login correctly. when modified the grub.cfg in UK 14.10, UK14.04 login normally.

OS：UK14.04 32-bit  UK14.10 32-bit  mint-64bit
machine：dell vostro

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: trusty ubuntukylin

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https://bugs.launchpad.net/bugs/1396583

Title:
  when update grub-pc using update-manager,system can not login

Status in “grub2” package in Ubuntu:
  New

Bug description:
  Description:
  I had installed multi-operating system, mint, Ubuntu Kylin 14.04, Ubuntu Kylin 14.10, leading by UK14.04 by default.
  I run update-manager in UK14.04, when it run update grub-pc, update-manager crashed, I had to restart the system, UK14.04 could not login,detail in attachment. the others two system login correctly. when modified the grub.cfg in UK 14.10, UK14.04 login normally.

  OS：UK14.04 32-bit  UK14.10 32-bit  mint-64bit
  machine：dell vostro

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