Your disk is currently partitioned to boot in bios mode, but you booted
the 16.04 installer in EFI mode. A warning message prompted you that
this could be a problem and recommended performing a bios mode install
instead, but you chose not to. You either need to perform the bios mode
install, or
Haz esto:
1. Edita este reporte de fallo para que esté en Inglés, pues aquí en Launchpad
sólo se utiliza esa lengua.
2. Cambia el status de este bug de nuevo a "confirmed".
Muchas gracias.
** Changed in: grub-installer (Ubuntu)
Status: Confirmed => Incomplete
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You received this bug
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: grub-installer (Ubuntu)
Status: New => Confirmed
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1571137