If you want to boot an old snapshot, but not to do a rollback,
we need to tell the kernel which snapshot to use. This patch
also fixes the broken layout of the grub snapshot menu.
grub-snapshot.cfg should not be sourced at the begining, but
at the end of grub.cfg. Else with creating the first snapshot
this entry is getting the default boot target and the system
does not boot automatically anymore.
Generate a serial line setup for the isolinux.cfg file
according to the bootloader_console attribute from the
XML description. In addition delete the use of the obsolete
vga kernel parameter and work with the MENU RESOLUTION
ui configuration parameter instead
Some bootloader e.g grub supports graphics, text and also
serial consoles to hand over the output of the bootloader
menu. With this patch we allow to customize the console
used by the bootloader. So far only grub makes use of the
new attribute
<type ... bootloader_console="serial|console|gfxterm"/>
This references Trello:
https://trello.com/c/q9EhNKKV/155-support-for-grub2-serial-console
We can't expect that specific fonts to exist for all theme packages
in all distributions. The code here should rely only on theme.txt
In addition we check if any theme or font related data is found
in the legacy grub location boot/grub which imho should not be
used for grub2
An additional hidden entry allows the user to switch between the
graphics and the serial console by pressing the 't' key. The kiwi
grub2 template adds this switch if the terminal mode is set to
graphics. The additional entries are only effective of the
grub_platform is set to efi. Fixes#80
