[Bug 1049549] Re: Ubiquity manual partitioning offers to install grub in a way that breaks Windows boot

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: ubiquity (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1049549

Title:
  Ubiquity manual partitioning offers to install grub in a way that
  breaks Windows boot

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  The "Something else" option (= manual partitioning screen) allows the user to change the location where GRUB stage1 will be installed.
  ("Device for bootloader installation" combobox).
  AFAIK, the default entry in this combobox is /dev/sda. Currently the combobox also allows to select any partition (eg /dev/sda1 , /dev/sda2...)

  The following entries break Windows boot and MUST be removed:
  - all partitions (eg /dev/sda1 , /dev/sda2...) containing Windows boot files (bootmgr, ntldr). In other words, all partitions detected as "Windows" by os-prober.

  Probably the problem is the same with systems other than Windows, so I
  recommend to remove all partitions detected by os-prober.

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