Bug#785069: jessie live-installer can't install grub when booted via usb drive without internet
I'm having the same problem and dug into it a bit. The bug happens as
1. live-installer installs the system fine, and sets up the apt sources
via configure_apt (present in base-installer/library.sh) in its
2. apt-setup enters the scene and configures the sources.list again, but
fails to add the cdrom.
3. GRUB cannot be found since there's no network and CD sources are disabled.
We're currently experiencing the issue in Pardus and I'm currently
documenting and working on the issue and can cooperate with any willing