[Bug 959446] Re: Ubiquity failed to install GRUB on a EFI & non-GPT system with pre-installed Windows

YannUbuntu yannubuntu at gmail.com
Fri Sep 14 14:24:39 UTC 2012

*** This bug is a duplicate of bug 1050940 ***

** This bug has been marked a duplicate of bug 1050940
   Ubiquity fails creating a correct Windows dualboot on EFI computers

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  Ubiquity failed to install GRUB on a EFI & non-GPT system with pre-
  installed Windows

Status in “ubiquity” package in Ubuntu:

Bug description:
  Initial situation: HP Touchsmart 520, 64bit 4GB, pre-installed
  Windows7 (on sda1 and sda2), non-GPT disk, 356Go unpartitionned space
  after Windows.

  Installed Ubuntu 11.10 via automatic installer. Ubiquity gave no
  errors nor warnings during install.

  After install:
  - after reboot, no access to Ubuntu. PC boots directly to Windows.
  - see attached files: /var/log/installer/syslog  ,  /var/log/installer/partman  and debug files,
  - see BootInfo summary created via Boot-Repair: http://paste.ubuntu.com/890361  (apparently boot is in EFI mode)
  - Ubuntu contains /boot/grub/grub.cfg , but no core.img and no grub.efi
  - MBR has not be modified (it contains no GRUB)

  WORKAROUND: purge and reinstall grub-pc via Boot-Repair, with nomodeset option, allowed to obtain GRUB menu with access to Ubuntu and Windows. See resulting BootInfo: http://paste.ubuntu.com/891331

  That means Ubiquity should not try to install grub-efi on this system,
  but grub-pc (+nomodeset) instead.

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