Ubuntu
ubiquity package

  1. Bug #430141
  2. Comment #7

Comment 7 for bug 430141

Revision history for this message
João Pinto (joaopinto) wrote : Re: No second OS is shown up in grub2

It seems that /usr/bin/os-prober is not installed or fails to run before the call to update-grub from the installer.
Running it manually and then update-grub will add the missing entries, for both windows and linux partitions.