Comment 19 for bug 424503

as cedric ( thanks to him)

I solved too the problem by comment this following line in /boot/grub/grub.cfg:

#if terminal_output gfxterm ; then true ; else
  # For backward compatibility with versions of terminal.mod that don't
  # understand terminal_output
     # terminal gfxterm
#fi

however i have no choice on grub boot